Hi,
I had the same problem some time back… but I think I figured out my problem.
I use A very fine gold lustre dust in the shade I want my cake to be, and add it to edible paint base.
Try to saturate the paint base with the lustre dust as much as possible, so that the gold paint you create is even and shiny.
I have used this “paint” on all shades of fondant, and it has come out perfect every time.
Hope this helps
:)
