Be sure to give that bondo plenty of time to cure...the more the better. like a week or so. My tank was my first experience w bondo. I did my best but not sure I mixed it absolutely correctly. it shrank a little, maybe over the next week or two. after I got my paint on.
I was a little disappointed. but I was the only one who noticed the little divets, or atleast nobody said they noticed. also after your sure it cures well. a thin coat of the bondo spot putty glaze. will make it even smoother. paint covers it better. I just added the glaze, wet sanded the tank a bit re-coated with paint, stuck my stickers and cleared over everything. Now the spots dont show at all.
Especially if your going with high gloss paint and clear !!! I used the matte finish clear.