Hi Duke;

I can't really answer your question myself, but I want to caution you that other answers you get may not be super-reliable either. I could be mistaken, but I'm not aware of any one currently posting on the forum who is an experienced pool plaster contractor with a good track record.

And, as far as I know, there are no really reliable 'good practice' guides.

If you can find an experienced plaster contractor with a good track record in your area, I'd put a lot more weight on that, than on the formula. One thing I do know: application method and skill matters at least as much as formula!

"PoolDoc"