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I am new to using molds as well, and over the past year I have tried some from Slumpys, Delphi and Bullseye. More recently I bought some of Laurie's bottomless molds and these are now my favorites. I don't have to set them on kiln furniture, just flat on the kiln shelf. The bottoms are perfectly fla...

I don't have any of those except the spray nozzle, and I will try that. It's a pretty strong one, but not the power of a pressure washer by far.

With casting molds I clean and rewash each time. It's a pain to clean the little crevices though, does anyone have a clever way to make that task more efficient?

Thank you both, that is going to save me a lot of work!

Interesting! So a mold will not have the same problem as a shelf does, if you do not change the wash each time? I would LOVE not to have to redo the molds.

I'm so glad I found this discussion, I thought I was losing it. I kept reading that Primo was so easy to wipe off but that has not been the case for me. I just came in from sanding my two shelves. So it sounds like I am apparently mixing up too much wash (when I shake it up to use the next time it g...