wetsand with 1500, 2000, 2500, 3000
start lower if they are rough. DO NOT apply any pressure. Just lightly… enough to get the paper to bite. Use plenty of water.
You can buff them out by hand using a rag and rubbing compound line 3M but a buffer would be easier. Doing the finish buff by hand is not hard. You just need to be gentle.
You can also shoot them with a clearcoat for the same effect and added protection.