Here’s an alternative approach to take with ABS plastic cowlings
and wheel pants.

I know many people like to get the fiberglass replacements for the
ABS parts in many kits, but for those of us on a budget, this is an
easy and inexpensive way to make the most out of what comes in
the kit. I’ve had good results with this method on several planes.
My cowls and pants look good, and as long as they’re not handled
too severely, they last a good long time, also.

The first step is to trim the edges of the pieces that will be glued
together as carefully as possible. If you’ve ever built a plastic
display model kit using liquid cement, the assembly is a
piece-of-cake. Use dope thinner as a liquid cement to glue the
pieces together. You can hold, clamp, or tape the pieces together
dry, then using a fine paint brush or applicator, run some thinner
into the seam. The thinner actually dissolves a bit of the plastic and
causes the pieces to “Weld” together.