can I seal a finished table?

Thanks in advance for any help. We purchased this table on heavy discount from Anthropologie and it’s in gorgeous condition, but I’ve noticed a couple tiny water marks on the top. I know this is “reclaimed” olive wood, and I’m wondering if there’s any way I can seal the top so that we don’t ruin it in the future by actually eating at the table. It’s very smooth and seems to be soft. I apologize for my lack of woodworking knowledge here. Thanks!

An urn for my dad

Birdseye & quilted maple.

Nerd art for some fellow nerds’ anniversary. No CNC, but I did get a ton of chisel practice.

What are my options here?

I’m going to inlay another piece of wood but I’m concerned with trapping air in this. I just added some starbond but should I completely fill the void?

Ash, Walnut Cutting board from scraps

This turned out great after adding a walnut slice to hide a mistake!

Gel stain over unfinished AND unfinished wood? New to wood working - top was terrible but rest was in pretty good condition so I just used a random orbital on the top and sanded the damaged down on other parts. Will the stain be very different? Should I sand it all down?

Today's work in progress:

Cherry handle, Sapele head. I'll finish it after engraving with mineral oil

quokkas, known as the happiest animal on earth. their home island was named 'Rat’s Nest Island' in 1696 by Dutch captain Willem de Vlanmigh after he mistook the quokkas for giant rats!

Play Dead

They’ll bring their kids to this daycare some day.

boulogne-sur-mer, france