You can learn to repair a cracked bathroom shower pan before you decide to replace it. It doesn't take much time and can save you a lot of money.
Step 1 - Sand
Lay a drop cloth to cover areas around the shower pan you do not want damaged. Use 80-grit sandpaper to smooth the surrounding area.
Step 2 - Cut the Patches and Apply Them
Purchase a repair kit from a home improvement store. Cut 3 fiber glass patches from the fiberglass cloth in your repair kit. Mix the resin and hardener from your kit according to the directions. Put 3 patches into the resin mixture. Remove the smallest patch from the mixture and place it on the crack. Next lay the second largest, then the third. Allow them to dry for 12 hours.
Step 3 - Sand Again
Sand the patches using 80-grit sandpaper. Use a putty knife to spread plastic filler from the kit evenly over the patched area and allow it to dry according to the directions. Use 80-grit sandpaper again to sand dried plastic filler.
Step 4 - Tint the Patch to Match the Surface
Use the tint from the kit to match the fiberglass. Apply a 1/8-thick layer with a paint roller over the cracked area. Cover the gel coating with plastic wrap for 12 hours.