I've been thinking about these panels that glue on to the door of my brothers car (the ones at the bottom, that bring the bottom of the door out to be flush with the added thickness of the side skirt). After my brother has the car for awhile and is ready to tear into it, I'd like to mold the body kit in and in the process, replace these door add-on panels with fiberglass. And make them part of the door. So how would I go about doing this?
It seems easy enough to get the bottom of the door down to bare metal, drape the matte over it, and start brushing on the resin. Then after some layers and some shaping I could use filler and block sand to perfection. But would this work? How well does resin stick to bare metal? Is there a better way to do it without welding?
And would this be a job for epoxy resin or polyester resin?
![](http://i38.tinypic.com/91cack.jpg)