thanks for this! the website recommended Helmar Krystal Kote Matte Varnish as a sealant for clay. Do you have experience using this sealant over spray painted clay?What were the results? I have the rustoleum rock texture spray.

https://www.amazon.com/gp/product/B00EZTD5B8/ref=ox_sc_act_title_2?smid=ATVPDKIKX0DER&psc=1