Thanks Booth11 you've put my mind at rest....looking forward to trying it tomorrow followed by PB sealant, like the idea of the gtechniq but got a nearly full bottle of the PB, will be seeing pink for a few weeks!
It's very effective on wheels and tailpipes, and used at that 1:10 dilution won't strip any protection you have on your wheels.
I do similar to Mr GTD, spray all wheels, wheel arches and tailpipes with Bilberry prior to snow foaming. Leave it to dwell for a few mins, I then apply snow foam to dry car, and over the top of the Bilberry on the wheels, then everything gets pressure wash rinsed after snow foam has dwelled, whilst I fill up my buckets.
Good luck.