Join Date: Jun 2005
Location: Chicago IL
Bikes: 1987 Schwinn Circuit, 2016 Colnago V1-r, 1990 Schwinn CrissCross
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Originally Posted by The Fixer
I've sanded my project frame down to the factory primer only, sprayed primer, and sprayed paint. I found stripping down to the bare metal a waste of time, especially if throwing some rattle can paint on it.
Yes, it is, because it's harder to get primer/surfacer to stick to bare metal than it is to get it to stick to existing, sanded factory primer.
Only things I would add would be to not just sand between coats, but wetsand (have a slow-running garden hose over your work as you sand; feathers better that way), and start with 320 for the primer coat and use 600 for your color coats.
Also, when shooting your clear, you may notice that it's a challenge to apply it smoothly. When you shoot one side of the frame, the other side of the tubing, and the rest of the frame, gets a lot of overspray, which will lead to a dimpled, or 'orange-peel' effect. It drove me nuts the first few times I painted frames. You will need to work fairly quickly to avoid this.