Pesonally I don't think its a silly thread

If the rubber trim is black (as they often use grey too) , it should stay the colour intended and not be bleached by the sun/chemicals Former Mod/Member, with the most post & Chicken George Arch nemesis

Yeah I find it really notices when the car is clean. Looks

First motor I have ever had this on, esp as its only a year old

If you use a paste wax on the rubbers it will clean, condition and protect from UV rays. AG rubber cleaner is also good or google black wow. Only a few resellers in the UK, but very good stuff.

I've come across this - it's the traffic film cleaner that car wash places use prior to jetwashing. If its not diluted enough it leaves marks also if dries before washed off. Done the same when I use the Snow foam cleaner - fades after time