Obviously the finish s main job will be to protect against water.
Best finish for hardwood coasters.
I would like to be able to first treat the wood with 100 tung oil.
Coasters are made with soft maple padauk and either mahogany or cherry.
Best furniture grippers selfadhesive rubber feet furniture floor protectors for keep in place furniture furniture stoppers.
Best finish for wood drink coasters.
When i made and sold engraved wood coasters on etsy i used spray can polyurethane.
One can costs about 10 and should finish 45 square feet or a coupl.
I ve yet to find a better looking finish than pure tung and it forms a hard finish like a build up finish.
Sand to 220 between coats.
So should to be happy on top of a drying oil.
It will deepen the color but the whole process goes very quickly compared to other methods.
Most sets of coasters contain at least four.
I did a test coaster and no finish it absorbed moisture got moldy and warped in a week i have been using an oak and purpleheart wine bottle and glass thing that has a spray poly on it and not one problem for about 6 months it was just on the desk and i set my glass on it as a coaster.
If you don t have a vacuum chamber i know i sure don t you can warm the wood and oil up for better absorption.
Last coat is up to you how smooth.
I love how the maple and padauk respond.
This is also an excellent opportunity to sand off any extra loose bark or to add finishing touches like sanding the edges.