I find that dry sanding with modern electric orbital sanders with dust collection works well for indoor minor repairs. Dust is a minimal problem when you compare the mess of wet sanding indoors. I also find that buffing with compound will produce the ultra high gloss finish people prefer ( until they find out how hard it is to keep it that way! ) and this will make somewhat of a mess as well. I actually use a metal polish on Corian with a foam pad and a buffer and it will shine like glass.