rusty table saw
As one of the prior replys recommended - use Johnson Paste Wax (in their yellow can) to protect the tabletop. The reason being that if you use oil - dust will stick to it and will wear off more quickly. Wax provides non-sticky protection and wears better. I used a toothbrush to brush wax into the tilt/elevation screw threads - no need to shine those up - the extra wax in those areas doesn't need to be removed and won't interfere with operation - though when first installing back - work through the full range of motion a couple of times.
Good luck - I can appreciate what you're going through. I'm also working on a Delta Sanding Center and Craftsman Planer that went through the same fire - still operational but need minor replacement items and rust removal from the water.