My LMGT-4s are used all year round.
Zed is a daily driver.
Gone through 2 winters so far and not a blemish.
2 other zed owners assured me it would be OK if I followed their regime so I took gamble and left them on.
However I wash them very gently weekly, gently agitating brake dust off using a microfibre in one hand and holding a hose in the other providing a constant flow of clean water. Then finish with normal car shampoo for a final once over again using a microfibrebefore rinsing and drying with a leafblower.
I apply Chemical Guys wheel sealant every 2-3 weeks so normally they are 99% clean after the prewash but shampoo just to be sure
If I'm really short on time and can't do a full seal I just use TurtleWax Glossgaurd on the lips and face. Goes on real quick with a MF applicator (just like an alcohol wipe) and can be buffed off almost immediately. Sometimes I'll leave the bodywork dirty and just do the wheels as a priority.
Some people on detailing forums think it excessive to seal so often but this is what others told me works for them and seems to be working for me.
Basically I reckon you have to wash the rims more gently than the body coz of the abrasive nature of brake dust.