I do not know where you are located...but a place here in Massachusetts gives Rotary class..it is a 1 day class..and well worth it...they now show wet sanding...
It is in Holyoke Ma. north of Sprinfield...
the place is
www.carproductsinc.com.... they have a link on bottom of home page for classes....some here have been and liked it....
Machine polishing is a very important step in paint perfection....and proper use of products to bring the paint to its best level...
Al