I use a silicone like what you would spray on your tires. Different brands like tire wet or Eagle One or whatever. I spray everything except the hood and seat. It keeps plastic and rubber conditioned, and metel from rusting or oxidizing. The bonus is that after your first trip, the sled really cleans up like new with not a lot of effort, as salt and dirt can NOT stick to the sled. I also coat my trailer wheels and hitch parts when storing or before each trip. I have been doing this proceedure for over 20 years with good luck. The only down side is when I try to trade my stuff in at the dealer. They always think that something MUST be wrong with the sled, because why else would I trade in something that still looks like new, even 8-10 year old stuff.