I don't know if the fender liner method or removing the fender panel method is "better". But the fender liner method is pretty quick comparatively. I didn't do any damage to the plastic fender liner doing it that way, and I did it in pretty cold weather (around freezing temp). With all the horror stories, I was surprised at how quick it was (40-45 min ish) and I wasn't exactly rushing, cleaned out the area, sprayed down some rust proofing and cleaned up the terminals in that time too.