I recently did this “paint-enhanced” slate coaster.  Plain engraved coasters look good, but by adding layers of paint on the coaster….lets just say that the images “pop”.  In this particular coaster, I started with background layers of white primer, gray primer and followed by a top coat of black.  The cool thing is that any combination of colors could be utilized.

Imaging your business logo, team logo or school logo on here.  Would that do a lot for your branding?

Adding paint colors and top protective coatings and do add to the manufacturing time and price, but the outcome is definitely worth it.