I bought my msp and when I did I noticed some rust in the door jam I thought alright no big deql but little did I know that the side skirt hid an entire section rusted I hammers out the bad stuff sanded some sprayed with rust killer and rust reformer there's more sanding to do but how would yall suggest that I fix the rust holes they would be hidden under the side skirt but they are still a problem ? Any insight would help fiberglass and bondo or sheet metal