Besides the tires and bearings which I always check the grease level, and I just changed them last year anyways, what else should I do it to? Its a galvanized trailer so there is no rust. I do notice rust on all the nuts and bolts though. Leaf springs squeek, then I just shoot some oil on them and they are fine. I dont see any cracks or anything on them. Its only been in salt water a couple of times and I always took it right down to a freshwater lake afterwards and dunked it or hosed it off. Anything else I should do? Thanks.