If your pool has a marcite finish, it is quite simple. Not easy, but simple. It can be completely polished with a diamond pad and a hydrotorque machine. A service like this should cost you around $600. It depends on the size of your pool. This procedure will make your surface feels glassy, extremely smooth.
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Use a pumice stone. Get it at a pool supply store. It soft, so you may need several.
Marcite is a "plaster" made from marble dust and white cement. It's put on top of the gunite and gives the pool a smooth finish and bright luster.
Plaster is usually applied onto Plasterboard to give it a smooth finish which can then be painted. There are other techniques, taping & jointing is one, though Plaster gives a better finish.
Yes, it is worth the cost to upgrade to Hydrazzo finish vs regular white plaster pool, it gives a fine smooth finish and is more durable. White plaster is least durable.
To finish the walls. Without plaster, the finish would be Plasterboard, which isn't smooth, and has gaps. Therefore could not be painted.
Is the water rusty color? Or is the rust color on the pool finish - plaster or vinyl or fiberglass?
The finish plaster is normally white all the way through. It sounds like you are dealing with a pool that has been replastered by the method of putting a "brown coat"/"scratch coat" (the gray plaster you noted) over the original finish plaster surface, and a new finish coat of white plaster on top of that. The scratch coat more like a thin concrete than plaster (doesn't have the white marble dust in it) and is used to get a better bond to the old surface.
Kal-Kote Finish Plaster is a white finish plaster that can be troweled on and left with a smooth or textured finish, over base coat and on top of blue board. We also use this plaster when we are resurfacing existing walls and ceilings that have been prepared using plaster washers and fiberglass mesh tapes over the cracks, and gluing the entire surface with "Plaster Weld " ( a Larson product ) to create a bond over previously painted walls and ceilings . We also tint the plaster to make any color desired , and apply two coats of machined buffed wax to give the walls a satin smooth finish burnished with steel wool .You will never have to paint again !
Kal-Kote Finish Plaster is a white finish plaster that can be troweled on and left with a smooth or textured finish, over base coat and on top of blue board. We also use this plaster when we are resurfacing existing walls and ceilings that have been prepared using plaster washers and fiberglass mesh tapes over the cracks, and gluing the entire surface with "Plaster Weld " ( a Larson product ) to create a bond over previously painted walls and ceilings . We also tint the plaster to make any color desired , and apply two coats of machined buffed wax to give the walls a satin smooth finish burnished with steel wool .You will never have to paint again !
Marcite was the material used to finish the interior of a concrete swimming pool. It is in simple terms a mixture of crushed marble and white cement mixed with water to form plaster which is then applied to the pool floor and walls with trowels to provide a smooth finish for the interior of the pool . These days we use what are known as exposed aggrigate materials to finish pools which contain man made quartz such as Diamond brite. Any further questions. you can reach me here.. diamondbritepools.com
The best color would be your choice of a new plaster finish. Why would you want to paint a pool???
Before the advent of plaster board (sheetrock), plaster over wood lath was the most commonly used method for creating smooth interior wall surfaces. It normally involved a rough basecoat over the wood lath, and then a smooth, white finish coat to create the final surface. Since sheetrock has gained popularity, plaster has become less common. However, special sheetrock, called blueboard, as still sometimes used as a base for a finish coat of smooth white plaster. This is a high end treatment that creates a smooth, seamless, hard, and extremely durable wall surface. Applying the plaster in this way is a tricky process that is best left to professional plasterers.
The hairline cracks in the Diamond Bright will not cause the pool to leak. You must have got plastered in hot weather and the plaster cured quickly. It is just cosmetic on the surface and not through the entire layer of plaster.