Cheers again,
Thought I'd clear it up with a phone call to the main man SBD, BS 00e55 White is the one he recommends for that 'old school' look.
He suggested the gloss version and the gloss level "is what it is" he confirmed as you can't vary it.
Well, 50% more at the current place (sand blasted, not dipped) would've meant £120!! Ouch!
Anyway, the place I took it to don't have that code in stock and so I'm picking it back up and sending it to SBD which is what I should've done in the first place! £60 all told. Sorted.