Well the brake fluid seemed to do the trick. I let it sit over night and it bubbled up the paint fairly well. The brown layer wasn't paint, it was body filler. That stuff was very difficult to get through as was the second color the cover was painted. Unfortunately, the not cracked covers I bought did have a crack in one of them. It was right next to the tab. I mixed up some Hysol and was able to get it inside the crack and made a nice support on the back side to help keep it from cracking again. I will say using the brake fluid is not clean in any way, shape, or form. I used a razor blade to help scrape and slice through the layers of paint. If I was a patient man I would put on a coat and occasionally re-apply more and just let it work, but I am not. So I would put on a coat, work on something for a bit, then scrape, re-apply........After I was done getting the paint off I thoroughly cleaned them with some degreaser I get from work.
I cleaned, de-rusted, and painted the air boxes. I know they will not be seen, but they are nice and clean looking now.
I have a set of each of these. Which one is correct for a K4? Neither set is in great condition and they both look like someone attempted to paint them, but didn't do a good job. These are the better of the two.
