Over the winter I have been putting my time in on the trainer but have been blowing through shorts and bibs. I thought it was due to the rollers I was training on but have realized that the left side of my saddle has been abrasive from laying the bike down at the end of last season. I don't want to buy a new seat any ideas on how to smooth out the plastic that got chewed up by the road enough to stop from killing all my bibs?