Bondo to fill ground effects

[whiteThunder]

i have a few holes in my wings west kit that i drilled so i could rivet it to the body. Can i use bondo to fill them, or is there something better to use for urethane. Also, i am looking to shave the front piece, or blend it so you don't see the seam where it meets the bumper. can bondo be used there as well. i have this 3m urethane stuff, but its like caulk and cannot be sanded. Anyone have experience? Thanks

[Rob Bell]

Re: Bondo to fill ground effects

Bondo might not work well on GFX because they can flex. There might be a derivative of Bondo specifically for that type of application though. I would check with a good paint/parts store or a body shop.