The different
Meg's products are compatible. The polish/glaze/LSP progression will work without bonding/etc. issues. *I* dunno if I'd bother with the #7 on b/c paint, if I really wanted to have a glaze step in there I'd use #3 or #81 instead. Many people find it tricky to use correctly (at least at first) and it doesn't do all that much for b/c paints IMO.