 The Cost of "DIY" Media Blasting..., or Should I buy the equipment for only one car project... |
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| 73Phoenix20 |
 Oct 9 2007, 11:35 AM
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Member  Group: Members Posts: 334 Joined: 15-June 05 From: Michiana Member No.: 4,283  |
I know some of you folks will have some advise for me on this subject...
I need answers to several questions regarding media blasting... 1. Is the 'Pressure Pot" Blast System significantly superior to the gravity fed system? I can get either one at Harbor Freight (and prolly other places) for about $50.00 difference, which is trivial, IF the Pressure Pot system really works better... 2. I can get Aluminum Oxide media for $40 per 25lb box... how much surface area will this cover, assuming I am removing the factory paint down to bare sheetmetal? 5 square feet? 10 square feet? More? For an easy example, will 25 lbs strip the hood of a 914? Or maybe the hood and trunk (top surface only)? 3. I can get crushed walnut shells for about $20.00 per box, but i assume they are much less effective? How much less? Will it take twice as much in walnut shells vs. aluminum oxide? 4. Luckily, I only need to strip the exterior, as the interior is in fantastic shape, and I am repainting to original color. What is the best material to use to mask areas that I don't want to get "accidentally" blasted? Heavy duct tape? Multiple layers of heavy plastic sheeting? 5. Will Aluminum Oxide risk warping of the sheet metal due to heating? I understand walnut shells won't warp panels? True or not? If they are only marginally less effective, and half the price, I guess I will go with the walnut shells? Prolly more, but that is all I can think of right now! Thanks folks! |
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| scotty b |
Oct 9 2007, 07:13 PM
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rust free you say ? Group: Members Posts: 16,375 Joined: 7-January 05 From: richmond, Va. Member No.: 3,419 Region Association: None |
FYI soda blasting requires a completely different setup then sand walnutetc. Also more $$$ I believe. I have sandblasted several cars with aluminum oxide and can assure you it can be done without damaging the panels. Guys who warp body panels DO NOT KNOW WHAT THEY ARE DOING !! DO NOT point the nozzle directly ( 90 deg)at the panel, strip using an angled ( close to 45 deg) pattern. Use around 40 lbs pressure, this will vary somewhat by the blaster and tip size. Do not use the harsher oxide. It comes in several different consistencies. Use the fine to medium grit. Keep the nozzle moving, you will warp the body by concentrating on one area until it is clean. Make certain you have a moisture seperator before the air inlet for the pot. Wet sand doesn't shoot too well. Move around to reduce heat and pressure. Be forwarned. It is nasty, hot, dirty, nasty, sweaty, dirty werk.
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Posts in this topic
73Phoenix20 The Cost of "DIY" Media Blasting... Oct 9 2007, 11:35 AM
Travis Neff Aluminum oxide is VERY aggressive, get ready for a... Oct 9 2007, 11:45 AM rhodyguy if you don't have one, the biggest exspence wi... Oct 9 2007, 12:11 PM Brian Mifsud When you are ready to media blast, rent a monster ... Oct 9 2007, 01:11 PM 73Phoenix20 I'm running a 1.5 HP Compressor on a 250 Gallo... Oct 9 2007, 01:19 PM Vacca Rabite If you trap the media, you can generally run it th... Oct 9 2007, 01:24 PM rhodyguy that compressor rental is a good idea. you know yo... Oct 9 2007, 01:31 PM Brian Mifsud Baking soda is a "salt", so you should b... Oct 9 2007, 01:33 PM 73Phoenix20 Hmmm... I like the BIG Rental Compressor idea, and... Oct 9 2007, 01:45 PM rhodyguy with the huge volume you can move up to a presure ... Oct 9 2007, 01:53 PM Richard Casto I am going through this right now. I had initially... Oct 9 2007, 04:23 PM
Wilhelm I have generally had better success with pressure ... Oct 9 2007, 05:20 PM 73Phoenix20 Hey, all great info! I will definitely want t... Oct 9 2007, 06:30 PM majkos :popcorn: Yeah! Keep them coming! :headban... Oct 9 2007, 06:42 PM 73Phoenix20 I'm thinking of getting one or two of those di... Oct 9 2007, 08:46 PM Jeff Hail Easy home blasting method:
If you have one of thos... Oct 9 2007, 10:03 PM 73Phoenix20 A Canopy! Great idea! I bought one a cou... Oct 10 2007, 08:23 AM Krieger914 We used to blast the airframes of B-25's with ... Oct 10 2007, 10:05 AM |
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