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I have sideskirts that don't fit well, so they need help. What are the best ways to fill gaps.. And are there easyish ways that are good?
The deal is; there is almost an inch between the sideskirt (MazdaSpeed CorkSport), and the side of my car, where the previous owner cut it.
What I'm thinking about doing is: glueing it on with "GreatStuff" expanding foam, and shaving the foam smooth, to Mould it, then Bondo, Primer, and paint. Would this work? Is there a better way? I'm going to be making other aero mods, and need to do this on those, too.
Thanks.

try to leave the bondo to a minimum because it cracks very easy if it built up to much, i would suggest a product called marine-tech and an adhesive called tiger seal, it did wonders on my skirts and have yet to see any cracks and they've been flexed to there limits thats forsure.

Thanks. I'll look for it at the boat store.