The reason I ask, is that if you used off the shelf fiberglass repair from Napa or advance auto or anything, you are going to have issues. It may look fine now, but it will not for very long. Those fiberglass resins are based from a polyester, you car is smc and the two don't mix. You would have been better off to get a 3M ahesive and fill the holes in. You could easily back the holes with a piece of cardboard you cut a piece out of your old doors that you are replacing. You do need to grind the outside of the hole a little, you want to give the fill material as much to bite onto as possible. Myself you grind the whole area down a little and fill the area and you can block that out afterwards, but you will end up with something that will not show through. Make sure you put a good epoxy coat down also before you paint.