The mill was pretty dirty and had surface rust on various parts. I pulled the table and saddle and de-rusted them with naval jelly and #0000 steel wool. Then they were dunked in water to neutralize the acid, followed by a soak in WD40 to get rid of the water, then rubbed down with oil. The same process was done on the 6 tool holders (ER25 collet holders). The headstock was removed and the Z and Y ways were cleaned with WD40 and #0000 steel wool. I flushed the ballscrew nuts with spindle oil until they ran clean and then repacked them with new lithium grease. All axis use double nuts so I had to re-adjust since they were taken apart. I found a service manual pdf for the F1 CNC and followed the instructions they gave for getting the ballscrews aligned when re-assembling.