You might consider a new & improved coat of paint if you are worried about rust - talk to your local paint shop - there are many options depending on the trouble you want to go to
If you have no rust now and don't want to go to the effort and expense that Dave did, I suggest a good wipe down at the end of each session and keep it somewhere where it can get a warm airflow to dry. Indoors, if you are lucky. Otherwise in as dry a location as you can find.