ok here is my situation. I'm doing a little prep work before my car is to be painted. basically after i've applied a thin layer of bondo, sanded to be very smooth (ie: finger running across it is hard to even tell the difference from the body to the bondo area. after i sand it / clean it i'll spray on a coat of primper and when it dries you can kinda see where the bondo is. It's a little hard to explain but there will be a circle or whatever shape the bondo is in. Looks kind of like an island? I've sanded it and sanded it (using 400 btw) and everytime i primer it, i keep seeing the island looking thing. I'm doing a feather technique, sanding outwards and it seems to be working VERY well. I've gotten the area so smooth is nuts. but the island looking thing remains will this show up after paint, or will all the layers of paint / clear coat get rid of it? different sand paper? different primper? could i be mixing the bondo/hardener wrong? ahh, i don't even know if it's something to worry about. When i run my fingers across it after it's primered you feel NOTHING, it's very consistant and smooth. any suggestions would be great. I'm trying to get my car prepped asap.