How to Paint a Fiberglass Swimming Pool

Lead Image for How to Paint a Fiberglass Swimming Pool
  • 8-10 hours
  • Intermediate
  • 30-45
What You'll Need
Paint roller
Epoxy paint
Brush with long handle
Tri-sodium phosphate
Wet vacuum
Push broom
Lint-free towels
200-grit sandpaper

A fiberglass swimming pool is a great example of a material that can last for a long time. This is especially the case if you maintain it regularly. One of the things you can do to maintain a fiberglass swimming pool is to paint it. You can hire a company that specializes in painting fiberglass swimming pools but that can cost a small fortune.

You can purchase all of the needed supplies at most local marine supply stores and home improvement stores. If the appearance of your fiberglass swimming pool and saving money are important to you, then paint the pool yourself. The information below will explain how to paint a fiberglass swimming pool.

Start with a Clean Pool

pulling the filter out of a pool

In order to paint the fiberglass swimming pool, you need to first drain it. Once all of the water has drained from the pool, you will want to make sure that it is dry and that no water remains. Use the wet vacuum to suck up any lingering puddles of water. Clean out the filter and all of the traps in the pool. Use the push broom to remove any dirt, leaves or debris that remains on the bottom of the pool and the sides. Mix water with some detergent until it is sudsy and soak a sponge in it. Wring out the excess water and wipe down the sides of the pool. Use the towel to dry the water off the sides of the pool.

Rough it Up


In order to get the paint to stick to the side of the pool, it needs to be roughed it or else it will not bind to the slick sides. In order to get rough sides, use sandpaper. Do not use a sander because they are not easily controlled. Instead, use a piece of 200-grit sandpaper and scuff the sides in a straight line. Paint sticks better to scuff marks that are formed in a straight line.

Use Chemical Cleaners

After sanding, you are left with an exposed surface. A chemical cleaning helps to prepare the fresh surface for painting. Measure out a half cup of trisodium phosphate and mix it with two gallons of warm water. Use the long-handled brush to clean the pool with this mixture. Rinse out the pool with fresh water. Allow the pool to dry for at least two days before continuing.

Paint the Pool

Make sure the pool is dry and that there are no puddles. Use painter's tape to mask off lights, the stairs, grates, and covers. Make sure the pool paint is properly mixed and begin applying it to the pool saving the floor of the pool for last. Once the entire pool is painted, cover it and wait about a week for the paint to cure and dry. Remove the tape and fill the pool with water.