Anthony
I don't think you'd go wrong with FinishKare 1000P Hi-Temp Sealant as LSP. It doesn't contain any fillers but its bloody great, large tin will last you ages, can be used to seal everything from wheels, calipers, exhausts.
I'd put it on top of autoglym SRP which will fill some of the scratches, you may also wish to consider incorporating Tardis & IronX once a year, before you clay