Question

What is done to rusty machine parts to make them work smoothly?

Answer 1

FOR THE SMOOTH WORKING OF RUSTY OLD MACHINICAL PARTS;
1)PAINT IS APPLIED TO REDUCE FURTHER RUSTING
2) APPLICATION OF GREASE AND OTHER LUBRICANTS.
3) CHANGING THE MACHINARY

Answer 2

We can apply oil or grease to rusty machine parts so that they work smoothly. These oil are called lubricants.