We have a very large outside pressure treated platform that has been painted in the past, many, many times. Paint of course is now loose and scaling. If the deck was in perfect shape, I'd rent a floor sander and have the job done ASAP. But it's got various issues that won't accommodate a sander. Ideal solution would be some machine like a floor buffer with a moderately aggressive wire brush to run over the surface. Know of anything like that available?