I've been selling commercially (all the unpainted items get sent out with a coat of primer on them).
I didn't realise that.
Do you put it in big print on your website? If not it might be worth pointing out - saves time and money.
I find it a hassle washing resins to get rid of mould release agent before undercoat.
It generally takes most of a weekend to do a batch - washing, waiting for it to dry fully, spraying, waiting for that to dry and the smell to go.