Sand blaster chassis then what ?, What would do next ? |
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Sand blaster chassis then what ?, What would do next ? |
914GTSTI |
Jul 28 2022, 12:27 PM
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#1
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Member Group: Members Posts: 270 Joined: 16-September 07 From: Glendale AZ Member No.: 8,123 Region Association: None |
Going to have my chassis sand blasted. What next steps do you guy's do ?
Randy |
friethmiller |
Jul 28 2022, 12:28 PM
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#2
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Member Group: Members Posts: 497 Joined: 10-February 19 From: Austin, TX Member No.: 22,863 Region Association: Southwest Region |
Paint with epoxy primer as soon as possible.
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SirAndy |
Jul 28 2022, 12:34 PM
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#3
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Resident German Group: Admin Posts: 41,673 Joined: 21-January 03 From: Oakland, Kalifornia Member No.: 179 Region Association: Northern California |
Going to have my chassis sand blasted. Don't ... I had my chassis sandblasted and 15+ years later it's still seeping sand from the seams. http://www.914world.com/bbs2/index.php?s=&...st&p=711752 (IMG:style_emoticons/default/icon8.gif) (IMG:style_emoticons/default/barf.gif) Any other media would be better than sand. (IMG:style_emoticons/default/popcorn[1].gif) (IMG:http://www.914world.com/bbs2/uploads/post-179-1151215349.jpg) |
sechszylinder |
Jul 28 2022, 12:39 PM
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#4
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Member Group: Members Posts: 247 Joined: 9-April 03 From: /earth/europe/germany/berlin Member No.: 545 Region Association: None |
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Cairo94507 |
Jul 28 2022, 01:00 PM
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#5
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Michael Group: Members Posts: 9,818 Joined: 1-November 08 From: Auburn, CA Member No.: 9,712 Region Association: Northern California |
Do a soda blast- anything but sand. (IMG:style_emoticons/default/beerchug.gif)
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930cabman |
Jul 28 2022, 01:10 PM
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#6
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Advanced Member Group: Members Posts: 3,138 Joined: 12-November 20 From: Buffalo Member No.: 24,877 Region Association: North East States |
I have considered spot blasting my 914.
If/when sand gets into openings and crevice's it will add weight and hold moisture |
theer |
Jul 28 2022, 01:19 PM
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#7
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Senior Member Group: Members Posts: 677 Joined: 31-July 15 From: Dover, MA Member No.: 19,014 Region Association: North East States |
Never tried it myself, but dry-ice blasting sounds great. No sand, no nothing, just evaporates off.
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Luke M |
Jul 28 2022, 02:55 PM
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#8
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Senior Member Group: Members Posts: 1,377 Joined: 8-February 05 From: WNY Member No.: 3,574 Region Association: North East States |
Going to have my chassis sand blasted. What next steps do you guy's do ? Randy I went through this last summer with my brothers 914-6 conv. I was going to do my factory 6 right after his. Once I saw the process I changed my mind. It's a mess and that's putting it kindly. My brothers car was wet blasted with light grit sand but it still warped the door skins and trunk lids. I watched the guy do the the whole car. Took his time and kept his distance from the panels. There was still warping. Not to mention the sand was everywhere and I mean everywhere. We taped up and capped a lot of the openings but that didn't help. We started blowing out sand right after it dried and still to this day you'll find sand spots. We blew out the longs and the whole car for days prior to sanding and epoxy primer. If you plan on doing the work get ready cause it's a time thing too. The chassis will start to flash rust and you'll be sanding away before you even spray any primer. Have a schedule set and stick with it. The guy that did our blast used a rust prevention chemical and it held for 4 to 5 days. After that the panels flashed and had to be sanded. I've yet to find a better way to strip my chassis. I'm not dipping the chassis so that's out. Vapor blasting maybe but would have to research it more. Whatever you decide on just give yourself enough time to blast , clean, and prime all within those 4 to 5 days. If not you'll be wishing you never blasted it. That's my experience with having the blasting done. Maybe others had better luck. |
ssstikircr |
Jul 28 2022, 03:03 PM
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#9
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Member Group: Members Posts: 200 Joined: 11-January 09 From: Fair Oaks, Ca Member No.: 9,920 Region Association: Northern California |
Spend a few bucks get a few different air blower nozzles and wands. Spend a day blowing every crevice and hole you can find. Then epoxy prime everything. Or depending if you have an absolute complete tear down have it dipped instead.
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Superhawk996 |
Jul 28 2022, 03:20 PM
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#10
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914 Guru Group: Members Posts: 5,886 Joined: 25-August 18 From: Woods of N. Idaho Member No.: 22,428 Region Association: Galt's Gulch |
Back in the day I did a combo.
Mostly chemically stripped and wire wheel for all the easy exterior panels. Not sure how well this will work now that the EPA has neutered most chemical strippers. I did attempt to sand blast a few rust pitted areas. As the others have stated, sand gets in between panels and comes out at the least opportune times. First when painting (IMG:style_emoticons/default/headbang.gif) and even years later I still had specks of sand coming out of absurd locations. Curious to see if anyone has actually used the dry ice blasting with success and without warping panels. |
JmuRiz |
Jul 28 2022, 03:31 PM
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#11
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914 Guru Group: Members Posts: 5,433 Joined: 30-December 02 From: NoVA Member No.: 50 Region Association: MidAtlantic Region |
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friethmiller |
Jul 28 2022, 03:32 PM
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#12
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Member Group: Members Posts: 497 Joined: 10-February 19 From: Austin, TX Member No.: 22,863 Region Association: Southwest Region |
Yeah @914GTSTI ,
I had mine glass blasted but didn't use epoxy primer which forced me to re-sand and paint each panel later. What a PITA! Learned a valuable lesson there. The glass grains left in my frame came out over time while on my rotisserie. Unlike other restorations, I pulled about every panel that could come off the car doing rust repair so very little residue/grains remained. I may opt for a different method for my upcoming LE restoration. I'm interested in what others have to say. |
NARP74 |
Jul 28 2022, 03:41 PM
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#13
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Senior Member Group: Members Posts: 1,073 Joined: 29-July 20 From: Colorado, USA, Earth Member No.: 24,549 Region Association: Rocky Mountains |
Most of the car shows I watch on TV are dipping them now.
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VaccaRabite |
Jul 28 2022, 03:43 PM
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#14
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En Garde! Group: Admin Posts: 13,465 Joined: 15-December 03 From: Dallastown, PA Member No.: 1,435 Region Association: MidAtlantic Region |
Don't sand blast. The sand gets everywhere and you won't find all the compacted sand just waiting to collect moisture and rust you from the inside out. Several of the member here can tell you all about that.
Soda works. Dry ice is awesome. When I did mine I just used stripper pads on a drill. These cars are not that big, and I was able to do it in about 2 days. Zach |
friethmiller |
Jul 28 2022, 03:49 PM
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#15
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Member Group: Members Posts: 497 Joined: 10-February 19 From: Austin, TX Member No.: 22,863 Region Association: Southwest Region |
Don't sand blast. The sand gets everywhere and you won't find all the compacted sand just waiting to collect moisture and rust you from the inside out. Several of the member here can tell you all about that. Soda works. Dry ice is awesome. When I did mine I just used stripper pads on a drill. These cars are not that big, and I was able to do it in about 2 days. Zach (IMG:style_emoticons/default/agree.gif) This might be what I do this time around. |
914GTSTI |
Jul 28 2022, 03:53 PM
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#16
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Member Group: Members Posts: 270 Joined: 16-September 07 From: Glendale AZ Member No.: 8,123 Region Association: None |
Ok.
No sand ! Soda ? Maybe. Dip I will need to look into. Thanks |
nathanxnathan |
Jul 28 2022, 04:13 PM
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#17
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Member Group: Members Posts: 291 Joined: 16-February 18 From: Laguna Beach, CA Member No.: 21,899 Region Association: Southern California |
I've been watching Wray Schelin's Proshaper Workshop Youtube channel and he's constantly talking about how sandblasting, even walnut blasting will warp panels and advocates chemical stripping.
I was thinking about pumping something like rust 911 through the longs at the back, but the paper heater tubes seem like they are a problem to do so up front. I've been spot blasting with glass bead in various areas. It's not as aggressive as sand and I don't think it is going to warp any panels. It does make a mess though. |
bbrock |
Jul 28 2022, 07:43 PM
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#18
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914 Guru Group: Members Posts: 5,269 Joined: 17-February 17 From: Montana Member No.: 20,845 Region Association: Rocky Mountains |
Oh goodie! I get to be the contrarian again. (IMG:style_emoticons/default/biggrin.gif)
I glass blasted my car myself. One of the least fun things a person can spend time doing, but it saved $. I had the car on a rotisserie which really helped rid the car of media. A few hours with shop vac, air hose, and spinning, spinning, spinning, the rotisserie as I worked. I haven't found a grain of media afterward. Not saying it was easy, but I'm not sorry I did it and don't know how I would have gotten the chassis to bare metal without blasting. Once down to bare metal, treat with Ospho and then epoxy primer. The Ospho kills any rust that might still be lurking, creates a protective coating to prevent flash rust, and it improves adhesion of the epoxy. PPG recommends phosphoric acid treatment to promote adhesion of their DPLF epoxy. |
bkrantz |
Jul 28 2022, 08:05 PM
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#19
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914 Guru Group: Members Posts: 7,800 Joined: 3-August 19 From: SW Colorado Member No.: 23,343 Region Association: Rocky Mountains |
Dipping is probably better, but remember that it will destroy the fiber heat tubes inside the longs. That will require some metal surgery to open the longs and replace the tubes.
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mepstein |
Jul 28 2022, 08:33 PM
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#20
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914-6 GT in waiting Group: Members Posts: 19,309 Joined: 19-September 09 From: Landenberg, PA/Wilmington, DE Member No.: 10,825 Region Association: MidAtlantic Region |
Dipping is only good if you e-coat after. Otherwise, all the spot welded seams and empty cavities (think rear suspension consoles) are bare. Theres no way to get regular primer in between spot welded panels. E-coat will get everywhere.
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