I've recently started experimenting with alcohol ink, which is a great way to create abstract of fluid art.  It also work really well on ceramics, such as these tile coasters I made a ton of.  These coasters are all hand-painted, then coated in clear epoxy resin to protect them from any spills.  I also added a cork backing to protect any tables or surfaces underneath them.  These are just a few of the over thirty I've made so far.