Well, first of all you would want to use a finishing polish after the Hyper Compound to remove the haze. I suppose you *could* use the SG after the finishing polish if it is filler/oil free, but to get maximum durability you have to use it over AIO.
Well, looks like I won't be sealing my brothers Volvo just yet. I'll just glaze #7 it after I polish it out, and wait for some AIO to come in the mail.