I've noticed a lot of people have found my blog through Googling the search term 'Rejuvenator Spirit Substitute', or something to that effect.
Well, if that's what you are looking for, I can tell you this much from what I have learnt myself.
Rejuvenator spirit is mixed with powdered colours and Superwhite to paint on fondant, rather like mixing poster paint with water.
You can also use either:
1: Vodka or another clear spirit - any alcohol would have evaporated by the time the cake is eaten and the best thing about it is that it dries really quickly without making your fondant all sticky. This can make it a hindrance though - like rejuvenator spirit itself it can start drying as soon as you have mixed it with the colour so you have to be quick!
2: Water. Yep, you can mix up your powdered colours with water to create an edible paint. This has the opposite up- and down-sides to vodka/spirits: It won't start drying as soon as you mix it with the powder, so you have more time to spend on your painting, but it can make your fondant very sticky, especially if you use too much. It also takes ages to dry.
Having done cocoa painting before now, which involves painting in different shades of brown using cocoa powder mixed with melted cocoa butter, I'm wondering if you could mix any colours with melted cocoa butter (or white fat). Hmmm. If you can, the disadvantage to that would be that it never really dries properly and could end up being smeared.
I'll have to try that one.
