Do you have to sandblast paint off a gunite pool in order to repaint?

Answer 1

Yes. Plaster will not stick to paint. You must sandblast off all the old paint plus any loose plaster under the paint. Surface preperation is the key to any good paint or plaster job.

Bill Soukup President Commercial Pool & Spa Supplies Inc.

Answer 2

It would depend on the condition of the gunite and how many layers of paint are underneath. If the gunite is cracked or popping in places, sandblasting may damage the pool more. If the pool has been painted only one time previously acid washing may suffice. But you will always need to acid wash as a part of prepping the pool prior to painting.

If there are several layers of paint on the pool sandblasting will ensure a better paint job. If you go with the acid washing and painting over existing paint be sure to have a chip of paint tested.

Answer 3

Hmmm, was the pool painted before? Why would yo want to paint a fiberglass pool? Are the fiberglass showing or coming off? Do a complete job by having a new fiberglass finish reapplied if the glass has deteriorated. Paint- yuk.

Answer 4

Pressure wash very close to the surface with a 15 degree tip and 2550psi or better.