Plastic Shower Paint

If necessary mix up a new batch of paint and apply a third coat of epoxy.
Plastic shower paint. Tape the plastic where it meets the base. All purpose cleaner is usually adequate. Re sand the fiberglass with 200 grit sandpaper to refine the surface.
Paint the plastic tub insert to create a new look for the bathroom. Inspect the surfaces after the paint has dried overnight. Cover the floor and walls around the shower with plastic sheeting held in place with masking tape.
Latex enamel in most cases a latex enamel will be sufficient for your bathroom and shower walls. Two coats are usually sufficient but a shower in poor shape may require three. You only need to sand lightly to roughen the surface which will help the paint stick to the shower surround.
De gloss and prepare the surface for priming by sanding with 100 grit sandpaper. Clean it off with a tack cloth. Wear a dust mask to protect your lungs while sanding and painting.
Scrub shower surfaces free of mildew and soap scum before you paint. Sand glossy painted surfaces to give it some teeth for the new paint. Use very fine grit sandpaper on the shower surround.
Choose a semi gloss or high gloss paint rather than a flat or eggshell. Tub and shower inserts are typically durable surfaces that can withstand a lot of abuse but they can become dingy or turn yellow over time especially if they are white. Cover all surrounding areas of the shower with sheets of plastic to prevent paint from being sprayed onto sections other than the base.