Apply a thin coat of gilding adhesive to the rough edge of the coaster. Set the coaster aside for 15 minutes or until the adhesive no longer appears to be milky white. Once the adhesive is tacky, lay the strip of metal leaf on your work surface and then place the coaster’s edge directly onto the leaf and roll it until the leaf has covered the edge of the coaster. It usually takes a strip or two to cover an entire coaster.
Once the metal leaf is on the coaster, use your dishrag to wipe away the excess leaf off of the coaster. Then, repeat the process by applying another coat of gilding adhesive, let it sit until tacky and then apply a second layer of leaf and wipe away excess with your dishrag.
If you have a piece of metal leaf that has spilled over the edges and you want to clean it up; you can use a cotton swab and some Goo Gone to clean up any mistakes.
Using your second paintbrush apply a thin coat of polyurethane to the leafed edges of your coasters. Once it’s dry, I like to apply a second coat for extra protection.
Last, but not least, add the cabinet bumpers to the bottoms of your coasters to prevent them from scratching your surfaces and there you have it. Your own fabulous set of agate coasters.