I just figured it would be a real good filler because (aside from the horrible smell) it goes on easy and sands super smooth, alot smoother than what I have used in regular wood filler. I am covering my plane with red fabric covering anyways, so would the red color of the bondo show through all that much? Do they make bondo in any color besides red?

On a Super Sportster 40 would the weight of bondo be all that significant with a .46 powering it? I have to buy the bondo for the wheel pants anyway and I hate to buy it just for that, I would really like to use it as a filler too instead of having to buy wood filler AND bondo.