It's been awhile since I've worked with fiberglass but I started on the main gear, in this case the left main wheelpant. The parts fit together pretty well but sections of the front half sit higher than the back half so you have to sand down the inside to make them fit properly.
I used the digital caliper and found that if you get it to about.070-- somewhere around there -- they'll fit together pretty well. I didn't want to go too much thinner than that.
