As you are carefully removing the wax you will need to make sure you are not getting wax back onto the countertop.
Marble wax seal.
This will remove any impurities from the surface of the marble that may interfere with the sealing process.
This will make your stone yellow.
Since marble countertops grace many kitchens the sealer will also be certified safe for use where food is prepared.
It will usually only take a few minutes.
I recommend dupont stonetech bulletproof sealer.
Stay away from wax and polish.
At a minimum wait at least 10 minutes for the wax to soak in.
This sealant is a protective layer between the stone and the outside world.
Spray the counter with a marble cleaner and buff dry with a soft cloth.
What should you use as a sealant.
Lastly remove the wax from your countertop.
There are specific marble polishes easily found.
This means it is nsf ansi 51 2012 compliant.
Marble wax is used as a coating to protect the surface of the marble.
Remove the wax.
Four no wax polishes.
It needs to have a solid manufacturer backed product warranty.
The best marble sealer is going have low or no vocs volatile organic compounds and be environmentally friendly.
To do this use grade 0000 steel wool.