I usually have to crank the hose on in the pool every month or so, for about 30 minutes. I guess my biggest concern is my kids cranking it on and not shutting the hose off. Plus, our tap water really IS nasty. I have filters on every single faucet in the house, including the icemaker. Tastes like I'm drinking rusty water.
Anyway, I've done some more research about this deal. Not going with Interlux Perfection. I contacted Interlux, and they mentioned that this product does not wear as well as a legitimate gel coat. So, re-application would be needed every few years. So, dug around a bit, and found some dude who sells his gel coat product on ebay. MAX GPE is the product. 2 part system, and would cost less than Interlux. Interlux said primer would be needed, preferably their primer. 2-3 coats. MAX GPE needs no primer, enough product for 3 coats, plus some leftover.
I paid 60 bucks for the MAX GPE system, and will get started in the next week or so, hopefully. Interlux would have been 50 for their system, plus another 30 for their primer.
Wonder if the OP ever got his slide done?