I was just wondering. I'm priming and just starting to fill the pin holes, cracks etc, on my Bell 222. I know this is the plane forum, I'm a plane guy too, but this should apply to any fiberglass fuse

Now I know what all of you mean by pin holes [X(] cripes sake. Anyway, I'm using the basic red modlers putty to fill everything in b4 I sand & prime again. I was thinking looking at this little tube, which I probably paid $6 for, and a can of bondo (a lot more for the money) I have in the basement which I probably paid around the same or a little more for. My question is: Does anyone use bondo? Would it be to heavy? Would it not stick? I've never used bondo yet. I have it because someone shot a bullet through my wifes door the other week (we were in bed sleeping, I did wake up, it was 3 shots, one hit my wifes car, gang bangers, I'm sure), and I'm waiting for the weather to warm up a bit b4 I fill it in. Back to the subject, sorry. So far I haven't read of anyone using it, so I'm guessing its not a good idea. Anyway, any advice, comments etc would be appreciated. I forgot to mention that for primer, I'm using flexible bumper primer, actual name Wurth saBesto Flexi-Prime. I'm going to use automotive paint.
Thanks!
Joe