Yeah weather looks sh!t m8, I was hoping to try some Heritage wax ( getting my hands on a free sample ) over the weekend but the weather doesn't look promising....Re SRP - the secret to this stuff is to use a small amount and work it into small areas at a time, work it until it goes clear.... That way it's piss easy to buff off and very little white powder residue..
Auto Glym Super Resin polish does pretty much a cracking job on any colour! Has fillers in to mask swirl marks etc.. They also do an Ultra Deep polish for dark colours but never tried it myself. You can't go wrong with Super Resin though. and 3 for 2 at the mo at Halfrauds on valeting products.