In the next day or so hopefully I'll be taking possession of a "new to me" mill. It has one small glitch that I'm aware of immediately (and probably more that I'll learn about after I try to use it). Someone went a little too low on the table and milled it a bit. Is this something that:
a) I should be worried about?
b) that can be repaired? I have a TIG and I was thinking if I just heated the table up with a torch a bit and then filled it in and sanded it smooth, I could probably fix it. But I don't know if the heat will hurt anything else but I would worry about just TIGging a big chunk of metal like that without pre-heating it a little.

Any suggestions...I searched and didn't really find anything.

It's a scar. At least you can always say you did'nt do it. Consider it "pre-bashed".
question a: no
question b: with welding you can maybe fix it visually, but you will damage straigthness.

agree with fka. don't mess with it, one of the advantages of cast iron is that its (relatively) stable, weld it and you introduce new stress.

Put aTooling Plate on it the full size of the table.

http://cgi.ebay.com/New-Matrix-Tooling-Fixture-Plate-Sherline-Taig-CNC_W0QQitemZ220021424554QQihZ012QQcategoryZ109681QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

I have to add that "sanding it smooth" is considered a major offense in machine land.

Put aTooling Plate on it the full size of the table.

http://cgi.ebay.com/New-Matrix-Tooling-Fixture-Plate-Sherline-Taig-CNC_W0QQitemZ220021424554QQihZ012QQcategoryZ109681QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

That's an idea...but I don't know about alluminum. I suppose this could be one of my first projects is building a fitted cover like that.

Anyway...the table is something like 45" wide so I still have plenty of smooth surface to work with. I just never see tables with scarred surfaces so I wasn't sure if it's something to be worried about.

I'm over it.

Thanks everyone.

I know your over it but I cant stop :D

JB-WELD
http://www.centralhobbies.com/building_materials/adhesives/JBwld.html

Chris64, You could chemically clean the surface(s) you want to restore; overfill the surface(s) with Devcon plastic steel/iron or some other; let it cure properly; fly cut the surface to match the table surface. Cosmetically, an orbital sander and steel wool look a lot like a smooth used surface.