How to Paint Over a Hot Tub

The finishing paint on a hot tub may begin to crack or peel after several hours of use. Over time, the combination of heated water and body contact against the hot tub's wall can cause the paint to flake. When the paint cracks or peels, you can either strip it down to the bare fiberglass and repaint over it or uninstall the spa and purchase a new one. The latter option is the most expensive, while any hottub owner can accomplish the former with some preparation and time.

Garden hose
Shop vacuum
Towels
Rubber gloves
Muriatic acid
Buckets
Scrub brush
Spa paint
Hardener
Paint brush

Instructions

- 1
  Connect a garden hose to the drain line, ensure the hot tub is off and drain the water out of the spa.
- 2
  Close the drain line and use a shop vac to suck out any remaining water. Allow the hot tub to air dry or wipe it down with towels.
- 3
  Abrade the entire hot tub thoroughly with 100-grit sandpaper. Sand from the top of the hot tub to the bottom, going in concentric rows from one side of the whirlpool bath to the other to ensure you don't miss any spots.
- 4
  Wipe down the hot tub with towels, then put on rubber gloves and combine one-half quart of muriatic acid with 1 gallon of water in a bucket.
- 5
  Clean the hot tub thoroughly with the muriatic acid and water mixture using a scrub brush. Once cleaned, rinse with the garden hose. Allow the hot tub to dry completely before painting.
- 6
  Mix spa paint with hardener in a bucket, following the manufacturer's proprietary instructions. Paint your hot tub with a paintbrush and let dry for 24 hours. Apply a second coat of spa paint with hardener thereafter and allow to dry for 48 to 72 hours, or as long as directed by the manufacturer, before refilling your hot tub with water.

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