I'm trying to make my first resin wheels but when I'd made the first part of the mold and tried to remove the clay from one side of the wheel a lot of it stuck and it was near impossible to get it all off without ruining the mold. I couldn't tell you exactly what clay I was using apart from it was brown modelling clay. This could be the complete opposite of what I should have used but I didn't know. I seen somewhere that plays dough could be used would this be okay? Or is there any better things to use in the uk?