Repairing 90-93 door sills (how to) ????

[JeffP1167]

A piece of my 90 door sill broke off. I still have the piece from it though ..... Have any of you fiberglassed these with success and if you were to how would the plastic react to the resin? If I used a thin mat would they still fit as good?

Both of them have more cracks and I thought about replacing them but figured other used ones can't be in much better condition then these. So whats the best way to repair these and strengthen them?

 

[mrvette]

My '87 had a tan interior, but the tops of the door liner/sills? were black, and so the backing was some black plastic that I never found a glue to adhere to it, not for very long with any strength anyway.....I don't remember trying fiberglass though, maybe.....:surrender:

 

[Twin_Turbo]

epoxy adhesive, I've used that to repair stuff like that by applying it to the cracked area and adding a patch on the rear for added strength.