I removed cosmolite and have been 1023 saw sparingly each afternoon building a router table. I slid the fence over to make a cut today and overnight several spots of rust and discoloration have appeared on the table. I will be the first to admit after cleaning the saw three or four weeks ago I have not applied anything special to it or my planer but sure didn't expect rust to appear out of the blue overnight.Is there anything I am supposed to be applying to the surface and if so what would cause rust spots over night that steel wool wont remove?