I'd get some diatom earth - or Mothers polish and polish it off.
Mothers polish at auto shop. Can get red and worst case black polish there.
Rubbing compound - something that will absorb this stuff and cart it away.

Martin

Sam Takoy wrote:
Hi,

I'm rehabbing an old craftsman saw which has never been used but sat in
a garage for 20+ years. The tar paper had completely rusted into the
surfaces. I have cleaned it up substantially but I just can't seem to
lift the remaining grime off of it. The funny thing is that the grime
seems to move around the saw (for example if I rub it with my finger),
but it's just too sticky to come up. Here are two pictures:

http://freeboundaries.com/grime1.jpg
http://freeboundaries.com/grime2.jpg

I have tried:

Scotch Brite
Steel wool
Sand paper

in combinations with:

WD40
Goof off
Acetone
dishwasher soap
baking soda
mineral spirits

Nothing works!

Any further ideas would be appreciated!

Thanks!

Sam