What you should do, depends on your budget and how much a less than perfect pool surface bothers you and your family.

How to proceed, also depends on your budget. You might want to take a look at Kelley Tech's guides: http://www.kelleytech.com/olympic/ol...-bulletins.asp

However, if you want to go with a really new and durable surface, whether it's properly applied epoxy OR plaster, your first step is going to be to strip what's there, completely. That hodge-podge of coatings is going to make anything put on top of it unreliable. (Fiberglass is a possible exception -- but fiberglass pool rehab coatings have a very checkered history. Unless you have a skilled local installer who you completely trust, I would recommend ruling fiberglass out.)

When I've had to strip surfaces, this is the tool I've used: http://www.aurand.net/aurandweb/site/electric_tools.php . If you wanted to do it yourself, you could buy one of these, some Zeron, and some Poxoprime . . . and do your pool in sections, over a couple of seasons.

Ben