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W661335PF »
https://forums.nicoclub.com/w661335pf-u83300.html
Fri Jan 04, 2008 5:09 pm
You may be able to sand the chrome down using 400 paper, which is very gentle. Following the sanding, there are sealants you can rub over the rim's edge where the tire seal is created. This should do the trick. This is actually as ancient a problem as the old steel rims that rusted. A little gentle sanding plus a gentle adhesive that also created a rubbery bond was all it took. Just be sure to not sand only one spot, otherwise you'll create a valley that leaks.
Tire Rack guys can be of help; however, I've found them to also give incorrect advice at times.