Martin you’re gonna have to get this idea of “but there doesnt seem to be any call for it round this way” out of your head, thats because your customers aren’t signmakers, have never seen this board, don’t read Signcraft so haven’t a clue , now this is true when George Stephenson first told of his dream of people travelling great distances on his “Locomotives” at great speed people just laughed and said that the human body wouldn’t be able to stand travelling at 30mph DUH!
Look mate if they don’t know about them, how the heck are they gonna come in and ask for it!
If you want some of this work then make one for the shop, change your shop sign or add another dimensional sign along with the existing one, that way you’ll learn something new and have fun too, you’ve only got to sell one mate to get the ball rolling.
Make one for yourself and next time a customer comes in looking for a sign, show him this brilliant sandblasted/dimensional sign you have up on the wall!