Hi,

I'm in the process of restoring an old craftsman 113 table saw. I currently working on the table top (cleaning the rust, sanding etc.) and after reading quite a bit about clear coat I decided to go with water-based polyurethane coating. After applying a thin coat (which dried almost immediately) I notices yellow stains across the table top. Can somebody explain why this is happening? Is this rust? can it be removed? what other options do I have?
I didn't encounter this issue in any video/review/discussion about the subject.


Thanks in advance
Yuval
stains.jpg