@ksenia I haven't yet but I've been thinking about it recently. A lot of my stuff has metallic ink/paint in there, I'd have to look at a sticker place in the UK that can do specific bits in metallic colours. My main barrier is I have zero upfront money I can put into buying stickers in bulk before they sell, so usually I just upload things to print-on-demand sites like Redbubble.
W
