OT: Powder coating for dummies |
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OT: Powder coating for dummies |
ninefourteener |
May 8 2006, 12:06 PM
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#1
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Perfectly Normal Guy :) Group: Members Posts: 1,216 Joined: 3-June 03 From: St. Louis, MO Member No.: 779 |
So yesterday I was in Sears getting a new wheel for my lawnmower (don't ask)..... and I came across a powder coating gun for like $130 (ish) dollars.
Plus, I saw the little "packets" of colored powder for next to nothing..... and I thought to myself... "Is it really this easy and cheap"??? Am I missing something? I really know nothing about powder coating, other than the awesome final product. Is it really this easy? Am I missing something? I thought about powder coating the original wheels on the WRX in a satin black.... is a $130 gun, and a few packets of "black" all I need??? ----confused..... |
zymurgist |
May 8 2006, 12:26 PM
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#2
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"Ace" Mechanic Group: Members Posts: 7,411 Joined: 9-June 05 From: Hagerstown, MD Member No.: 4,238 Region Association: None |
You need an oven that you won't be cooking food in any more. At least that's what the Eastwood instruction book says. I got my powedercoating oven for free by advertising at work.
For best results on parts, you may want to use a bead (or sand) blaster to rough up the surface. I sandblasted a lot of steel and cast iron parts... the steel parts almost all turned out nice, but the cast iron parts seem to have a bit of rust bleeding through (even though I thought I had blasted all the rust loose). |
StratPlayer |
May 8 2006, 12:29 PM
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#3
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StratPlayer Group: Members Posts: 3,278 Joined: 27-December 02 From: SLC, Utah Member No.: 27 Region Association: Rocky Mountains |
I have the same powder coating gun. I bought it just a few months ago. Yes it is easy the hardest part is preparing the piece that is to be coated. A wheel will fit into a standard house stove oven. I didn't buy any of Sears powder, I bought my powder from Columbia Coatings. You can buy as little as 2 oz. of powder at a time from them, their powders are excellent. I have a thread about the first things that I coated. http://www.914world.com/bbs2/index.php?show...=powder+coating
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TonyAKAVW |
May 8 2006, 12:48 PM
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#4
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That's my ride. Group: Members Posts: 2,151 Joined: 17-January 03 From: Redondo Beach, CA Member No.: 166 Region Association: None |
I have a gun that I bought at Harbor Freight and it works fine. I live near the beach, and I can really tell a difference on a humid day. The static charge dissipates over a shorter distance.
Baking the parts is really the most tricky step. I use a propane space heater and some pieces of sheet metal to form a quasi-oven and it seems to work well with some patience and attention. I'm probalby not getting the exact 400 degrees for 20 minutes, but it is close enough. Occasionally I will over heat the parts and th powder can look a little burned. Surface preparation like with any other coating is really important. -Tony |
ninefourteener |
May 8 2006, 01:26 PM
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#5
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Perfectly Normal Guy :) Group: Members Posts: 1,216 Joined: 3-June 03 From: St. Louis, MO Member No.: 779 |
Obviously there was one crucial step I didn't know about powder coating......... BAKING.
Yea..... My wife almost shot me when I used the kitchen sink to clean car parts....... I can imagine what would happen when she finds a wheel in the oven--LOL |
Engman |
May 8 2006, 01:33 PM
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#6
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Zoisite Group: Benefactors Posts: 1,349 Joined: 25-March 03 From: New Albany, IN Member No.: 475 |
Keep in mind that 90% of any painting is the surface prep.
M |
yarin |
May 8 2006, 02:26 PM
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#7
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'14-X'in FOOL Group: Members Posts: 988 Joined: 13-May 03 From: Guttenberg, NJ Member No.: 693 Region Association: North East States |
Is $130 for the gun that doesn't requite a compressor?
I bought the kit off columbia coatings two years ago. I finally used it to coat my intake parts. Here are pics: http://www.flickr.com/photos/infinitelydig...57594124768996/ I bought a Walmart GE Oven for $50, worked perfectly. You need a small compressor to push about 10psi. I sand blasted all of the parts first. Prep is the most time consuming part. |
davep |
May 8 2006, 05:10 PM
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#8
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914 Historian Group: Benefactors Posts: 5,141 Joined: 13-October 03 From: Burford, ON, N0E 1A0 Member No.: 1,244 Region Association: Canada |
About all I remember of the prep part of the powder paint line I worked on is that it was a multi step process. I think there was a phosphating section and a rince or two. The parts have to be superclean, sandblasting is not enough.
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dweymer |
May 8 2006, 06:13 PM
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#9
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Member Group: Members Posts: 110 Joined: 22-November 05 From: orlando, fl Member No.: 5,167 |
I have a gun that I bought at Harbor Freight and it works fine. I live near the beach, and I can really tell a difference on a humid day. The static charge dissipates over a shorter distance. Baking the parts is really the most tricky step. I use a propane space heater and some pieces of sheet metal to form a quasi-oven and it seems to work well with some patience and attention. I'm probalby not getting the exact 400 degrees for 20 minutes, but it is close enough. Occasionally I will over heat the parts and th powder can look a little burned. Surface preparation like with any other coating is really important. -Tony Got any pix? I bought the stooopid infrared heater 1500w and will cook to about 190, uneven as hell. I just bought a propane infrared heater and was going to so the same. |
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