Very nice detail and photos in your updates
Thanks! That's high praise coming from the Godfather of Drill Press Restoration!
I think you could still double the citric acid formula. To reduce the amount of CA solution required (or any de-rusting solution), insert a #13 rubber stopper into the bottom of the column before inserting the column into the pvc.
Yep, I think you're right. I was originally worried about doing something weird to the metal (I'm not familiar with using citric acid in that way), but I'm sure I could have been way more generous with the concentration.
Table Surface
I decided to go ahead and finish the machined surface of the table prior to starting with the paint. I started by sanding it with an orbital sander with 220 grit sandpaper. I sprayed on a little WD-40 for lubrication.
I maybe only did that for a minute or so. I cleaned the grime off with Simple Green.
Then I repeated the whole process again using 320 grit sandpaper. It seemed to get noticeably shinier with the 320 grit. I also used the 320 grit to sand off the top of the ring around the column hole and chuck wrench hole (
I debated that decision, but decided I liked the look of the bare metal in those spots)
Then I got out the angle grinder with the wool flap disc polishing wheel, and applied some Black Emery polishing compound.
Cleaned off the compound with Simple Green, then repeated that process with the Green Stainless polishing compound.
It came out looking really nice, and since I can still see the machining marks, I don't think the sandpaper was overly aggressive.
Finished it off with some paste wax to protect the surface, before taping it off for paint.
