interior plastic modification help

[sniper]

With all due respect, there are a few problems with the advice above. First is that fiberglass resin will not adhere to plastic. Second, is that he made no mention of using actual fiberglass. Resin by itself over cloth is weak and will get smashed in with the slightest taps of the foot. The fiberglass will give the kick panel strength, but if not careful too much heat while curing will warp the panels. But you must use glass. The first layer of material, needs only a wet out of resin.



Anytime I do any fiberglass over plastic, I first properly prep the piece and use an adhesion promoter then paint it with epoxy primer. Resin will bite to that primer. But you must have a great bond of primer to plastic. I also drill holes throughout the plastic to create a mechanical adhesion as well.
You can glue the rings with simple hot glue. Tape off the inside part of the rings to make shape up easier, with little to no resin getting on the inside of the ring. Don't add to much bulk to the edges especially near the door jamb. You can simply add a layer of glass on the outside, then from the inside or rear of panel add more glass to the back of the face of the panel. Adding your build upon the inside. This will also reduce finish time on the outside.

There is certainly more than one way to skin a cat, but having done more than a few customs fiberglass pieces, I can assure you those extra steps will be rewarded.