what is done to rusty machine parts to make the work smoothly?

Answer 1

If the machine cannot be stopped for service, then use penetrating oil to lubricate, or use some other lubricant.

If at all possible though, sandblast the machine parts and then finely lubricate.

Answer 2

If this is a machine tool machine do not............DO NOT! even speak the word "sand" in front of it. If you do and it hears you it will be so frightened that it will never work with precision again. That includes words like sand paper, sanding block, and the all too horrible "Sand Blast"
If you want to be sweet to your machine get her a little wet with WD-40, Diesel Fuel, Chain Saw Oil or if you are going to make her wait in a forbidding environment keep her very well in a thin, or thick, protective coat of bearing pack grease. Other than that if you need to make a shine in all of the right places then use a "Wet Stone" to rub on flat places using distributed, gentle, firm, figure eight circular motions. Other than that, replace a few parts, have a few re-ground if you possible and then use her every time you get the

Answer 3

If they're really rusty the parts could be sand-blasted to help remove the rust. There should be some chemical called a 'reducing agent' like Naval Jelly that removes rust.

Answer 4

Kroil it! (Look it up)