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.
No, plaster of Paris and white cement are not the same. Plaster of Paris is a porous material that will disintegrate outside in the rain. White cement is more durable and should last outside in the rain.
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.
there is a product called "pebble tec" that is great. better than both products you mentioned. it is a little more expensive, but looks and lasts much better. other wise i would stay with plaster. from what i understand it adhears better to the gunite.
A reputed recipe for pool plaster on a gunite pool is 1 part white cement to 2 parts white (preferably quartz or silica) sand. You should probably also add a bonding agent to the mix to make sure that your new plaster adheres to the old. All of these can be found at pretty much any home repair or hardware store. Mix the dry ingredients first and then make a shallow depression and gradually add water till you have the consistency similar to chunky peanut butter. Add the bonding agent per the instructions on the package and you are ready to go. Good luck!
Just paint it white!!
There are many types (formulas/components) of Plaster. "Normal" plaster, if there is such a thing is usually White. Plaster is easily colored by using color additives when it is mixed.
The japanese put white plaster on the walls because it is fireproof
The black (burn) marks show up on Gray plaster pools. White plaster pools will show up as a yellow or rust color. Remove the tabs and put them in a proper floating devise, the marks will go away in time. Try using wet and dry sand paper on the burn marks to reduce their visibility and roughened plaster.. additionally, tablets of any size should NEVER be placed or tossed into the pool or skimmer. K
The red rose of Lancaster and the White Rose of York. Red on the outside, white in the middle.
Japan is your natural colors of outside but the flags colors are white with a red circle in the middle.
It makes very little difference
It makes very little difference