start with sand paper and a block, then move to high grit (2000 grit or higher) wet sand paper and wet sand
When going to the buffer, take your time and don't use too much pressure or too aggressive of grit, stay away from roll marks until the final polish
the final polish should be done with a loose cotton buff
as for products, Caswell has just about everything you need
https://www.caswellplating.com/buffing-polishing.html