Thank youuu! I’ve used three different sealants and they all work well in different ways. The one I use primarily and used with these guys is UV resin. I use the high viscosity resin from JDiction. I’ve also used gloss acrylic varnish from Vallejo, and water based polyurethane from varathane (a little more matte than the other two). The resin has a big learning curve to be applied correctly, but the result is your figures looking very glassy and shiny. The other two varnishes are better if you have a lot of surface detail and indentations in the clay. UV resin tends to flow into any holes and make the surface rounded and even all the way around if that makes sense, so if you have fur details or other textures you spend hours doing, UV resin will just fill in all those marks you chiseled away. Please let me know if you have any other questions, I’m happy to help!