I don't see any rust in the picture supplied. Never use water-based
solvents on iron. If there is tar residue you want to remove, the
acetone should have taken care of it. But, kerosene is perhaps the
best cleaning solvent to use on iron tables. It should remove or
loosen the tar, will remove light rust, prevent rust (and resonably
kind to your skin). Wipe clean with paper towels or a cotton cloth.
After you get your top clean use Johnson's Wax ($8) and buff it out or
get a can of Topcoat spray ($15). Be careful, there can be sharp
edges that can cut fingers! Sure, my expensive PM 66 has a few
defects but still a very accurate table saw. Don't neglect a fence
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