Last year I did nothing more than park my 52" tractor/mower and at the start of this season I had a bunch of moldy grass on the bottom and the deck was starting to rust. So, I figure that this year I better remove the deck (pain), and try to get all the stuck on grass off and treat the bottom w/ something... paint it maybe. If I had a pressure washer or sand blaster that would probobly be great... but I don't.