"Roland" wrote in message
om...
How much do i cut the muriatic acid?
Many thanks...

It's not a real critical thing. I'd start out with about a 25% acid to
water solution and see how that does. If you've got some tough areas that
need some extra punch, try 50/50. You'll see the acid go to work right
away. It foams. Once the foaming is done, that acid has been pretty much
neutralized. You'll still need to scrub with a 3M type pad. A pressure
washer is a handy thing to have as well.