NightBlackDelta, on Mar 8 2009, 04:34 AM, said:
So I have an M16 style foregrip, plastic, that came with my BT4. It was fading, worn unevenly, and so I thought I'd give it a nice spray of semi-gloss black (Replicating the C7A1s I encounter often.) So one half of the foregrip finished nicely. The other... not so much. So I want to strip it down to the plastic and start over. I've tried removing the paint before, but it's pretty hard to sand with a M16 foregrip (All the ridges and corrugated parts), and acetone didn't work very well. My friend may be able to get them sandblasted.. but apart from that, I don't know. Is there a way to strip it down easily and start over? Keep in mind this is plastic with some detail molded into it. (And I'm too poor to get a replacement.)
PS: I used Tremclad (Rustolium) I find that despite being a metal paint, it has good adhesion to plastic, none of this flaking or whatever.
Avoid sandblasting if you are concerned about th platic of the grip. But done carefully it will be fine.
Sand/glass paper it with fine paper to get a decent result. You don't have to remove all of the paint, and rubbing it down will give a good base for the next layer of paint. Ridges etc can be awkward but rub it in variuos directions to cope with the shape.
Thinners - rub it with a rag dipped in an appropriate thinner for the paint. But care has to be taken to ensure the chemicals do not afect the plastic as well.
I would recommend taking your time and rubbing it down.