Alright mate,
I found on my polished rim wheels, best bet was to clean them using a sponge and car cleaner first. After that rinse with plenty of water, then to spray on the rim (while still wet) detailing spray wiping off with a Micro fibre cloth. Once dry use PoorBoys Wheel Sealant, using this lovely pink cream wipe all over the alloy in a thin layer. Once you layer one wheel, give it a mist of detailing spray and move onto the next wheel.. do this all the way round and when you come back to the first one again, just reapply the PoorBoys sealant again and repeat all the way round again.
Once that done wipe of the sealant with a clean micro fibre cloth and admire!!
That process i suggest for the first time you do it, so that the PoorBoys has two layers to protect from then on, so when you clean it next time you one have to coat them once. Only every 3 months do i give them 2 coats.
This will stop them misting and also keep them clean thou the Salt grit and also day to day brake dust damage, as the sealant stops the superheated brake dust marking your alloys also....