Grinders spin way to fast.

Good lord. My B&D Grinder is 3000-7000 RPM. A brand new Porter Cable POLSIHER #
7336SP is 2500-6000 RPM.
Unless your boat is pretty new, you'll be using the upper RPM ranges once you
know how to handle it. Some grinders do up to 10'000 rpm fixed with NO load,
and even that's fine with a big pad. It slows down a lot when applying
wax/compound. Even skilled autoshops will use them, though paint buring is a
risk.
Sorry, BOB CARROL. I actually own and use these tools, so you can't come in and
hope to make crap up.
BUSTED AGAIN!

RB