Hi Beasia, Pretty Witty cakes do a spray called Sheen and shine spray, its a spray that seals the finish to whatever your making and protects it, gives a lovely sheen too, i think maybe this is what you mean, they show a video where they airbrush a cake board and seal it with this spray and it totally protects the colour, you can wash the board and the paint won’t come off, i hope this helps! :-)
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