I have an old pair of Mavic Montlery rims which I want to build up, but the sidewalls have a narrow groove worn into the middle section, I assume by the brake pads. On one rim the groove is still slight and the dimples are still present, while on the other rim the groove is more pronounced and has worn past the dimples. Should I use these rims or just ditch them? I know I could get better rims but these are nice classics and I'd like to use them if there aren't major safety issues here.