As the guys mention pull the saddle off and clean the ways. About all you can do is to use a round cornered stone and stone the scratch on the top of the knee and the bottom of the saddle. I would also replace the way wipers and clean the lube system, replace the Bijur metering units. If left alone they will snowball bigger. There is no way to repair them unless you want to strip the chrome and scrape it. Clean it up and never use a air hose to blow off the ways. I would bet that is why they are scratched because someone blew chips under the ways when they were trying to clean the ways. Air hoses used on a machine to clean are a machine rebuilders best friend, Thanks. (just kidding)