Repairing the step may be accomplished by using plaster patch found in some pool stores. You may have to drop the water level below the step involved. For large areas this may or may not work.
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Call your insurance first as they may cover it for free. If not, consult a pro or if money is tight and you have $10, you can do it yourself in around an hour with a Windshield Repair Kit.
No, you plaster or mud it first.
Depending on what the plaster surface damage is to the pool, it really is pretty easy to repair the plaster on your pool. You just need a chisel, or a small angle grinder if you are really handy, a hammer, a trowel, some water and a sponge. they sell pool patch kits for all the pool surfaces. look for pool plaster patch kits and you will find an easy to use solution.
Sand
Yes,you just need to patch the plaster first.
Yes you can. You must first paint over the old plaster with a product such as Eucoweld, which chemically adheres the new plaster to the old.
Because it was first found in Paris and it is also used as a plaster
When the blossoms first appear
It depends what the ceiling is. Presuming it is artex, you would need to PVA it first, and then apply plaster... so PVA, and plaster.
Rough or chipped stone tools were markers from the Stone Ages. The Stone Ages were when people first began to use stones as tools for hunting and fishing.
It was made from timber and plaster
It is a fresco made of dry plaster, a method of painting on plaster that is dried first and painted on later. Comparing this to the Minoan method of painting on wet plaster, this method did not do well in preserving the fresco as the fresco would fall off with the dry plaster if it cracks.The wet plaster made it easier for the paint to be absorbed as depicted in the Minoan artwork, the Bull Leaping scene, found in Knossos.