If you didnt mind the expense - CarPro DLUX is a superb product - takes a bit of prep work, but once you've applied it the trim, etc is treated for well over a year. Saves the pain staking re-application every few washes of the likes of a traditional water or gel based dressing. If that isnt for your taste CarPro PERL is also very good - water based so can dilute down depending on the need. Neat on the exterior, 3:1 for engine bays, 10:1 for interior, etc...and is reasonably durable for a water based product.

Snow foam - Bilt Hamber Auto Foam is a very popular seller but unfortunately we're out of stock due to the sale - has flown out! ODK Arctic, a range we've only had a while and some people have tested the water with it and those who have used Arctic Snowfoam are very pleased.