What's the best way to clean up old bats?

[MGHPro]

They all look like pro model bats and those are best to leave alone and not clean. The value is in the use, cleaning them would devalue them.

If they are minor leaguers, with no major league experience, and you want to clean them to improve their appearance, you're going to have a tough time. The heavy ball marks are tough to get rid of unless you refinish the bats completely.

Oil soap is good for cleaning, but any open grain will swell up from the water and sometimes be wider than before. If you want to post some close ups, I'll let you know what I would do. Your best bet, might be just lemon oil them to even out the finish and give them some shine
Matt