Thanks so much guys.
I bought some wood to place around the base and remove the black posterboard "dam". Ha, I hope the water doesn’t leak out!
I all seriousness, I'm have having a heck of a time getting the 2 part "Amazing Clear Cast" to harden is some areas. I used that for one layer because HL was out of the polyester casting resin. I didn't have any problems with one reacting with the other, in fact you can't tell which is which. I do believe I must not have mixed the two parts well enough even though I used my Badger paint stirrer. I'm sure it will eventually harden, I'm just impatient.
Like I said, the waves were made with just a line of the polyester resin with copious amounts of hardener so I could form them. The blower trick worked very well, though it still took at least an hour messing with it until the resin hardened.
I am very pleased with the outcome so far and I'm adding cotton to form the foam on the beach and just behind the wave.
It may be a while before i try a resin scene again though. Resin is very expensive stuff and does take quite a bit of work to get the look you want.
Steve