If it is just the cut edges of the fiberglass you want protection from that is an easy fix. Purchase the vinyl edge trim that gets used around the edges of automotive doors on cars and trucks. I bought a big roll of it to put around the cut edge of the belly band on my Campster
. It already has a sticky adhesive strip inside of it so that no other glue is needed to hold it in place.
It cost a lot less to purchase it from Ebay if you need quite a lot of it. My order was shipped direct from China and the product was of very high quality.
Below are the Ebay keywords for what I bought. I was specifically looking for the color black but for the fiberglass interior cabinets you will most likely want the clear or silver color. You can purchase this product locally in auto parts stores but it will cost you a lot more than the Ebay pricing. I paid around $12.00 with free shipping for a 20 foot roll.
Slip On Auto Car Door Edge Guard Black Molding Trim Protectors Strip 20ft