making coasters - how should i seal them?
so i'm in the process of making my own coasters out of air dry clay, i haven't used clay much so im pretty new to a lot of it
the clay is mostly dry but giving it another day to fully set before i paint over the top with acrylic paint designs, i bought a 'gloss clay varnish' from hobbycraft (uk) since i saw it and thought it would be good to use to seal the paint once it's dry, im just not sure if it would stand the test of time with coasters
they'd be used for primarily cold drinks, but hot drinks frequently too, just mostly cold ones.
some research has told me it might be better to either coat with just resin, or to use the hobbycraft varnish and then follow up with a coat of resin afterwards to ensure it's all good i also have considered using mod podge, i've only ever used it to seal paintings before so not sure if it's something that could help?
also are there any specific resins i should purchase? i've never used resin before so explain it to me like i've just been born 🙏
thank you so much!! any and all advice is much appreciated