Hello! I got both front wheel bearing sets off, and got the spindles that the bearings ride on cleaned up. However, there's some discoloration on the spindle itself, on both sides. Of course, it's on the spots where the bearings ride. The surface feels pretty smooth, but the discolorations have me concerned, especially since the passenger's side wheel growled when spun without the brake pads on, as well (thank goodness I decided to do both!). I think that both bearing sets were packed with the wrong grease at some point in the past; I just looked in the tube of M-B grease that I have and it's green; the passenger's side bearing set had red grease in it and the driver's side bearing set had grease that was a tan color.

Should I worry about the discoloration, or just put it all back together? Thanks in advance!

Also, (this may seem like a dumb question), what would make a single brake pad wear faster than the others? 3 of the 4 front brake pads had about half their service life left, while the 4th (passenger's side outer) was almost metal-on-metal. The car was pulling to the right before I took it out of commission, but I had assumed that that was due to the upper control arm bushings being almost completely destroyed (also replaced those today )...

Again, thanks in advance!

__________________
2001 VW Jetta TDI, 5 speed, daily driver
1991 Ford F-350, work in progress
1984 Ford F-250 4x4, 6.9l turbo diesel, 5 speed manual
Previous oilburners: 1980 IH Scout, 1984 E-350, 1985 M-B 300D, 1979 M-B 300SD, 1983 M-B 300D
Spark-free since 1999