I'm trying to do red roses but the gumpaste is getting really soft and the color is not as red as i want. What to do? Can i airbrush the roses just as they are (let them drying of course). Or will it bleed when they are on the fondant cake?
You can most certainly airbrush the flowers! Best to wait til they're dry so the moisture from the airbrush doesn't weaken them.
You can also dust them with red petal dust after they're dry. Then, pass them very quickly through steam from a kettle or garment steamer to set the color.
I buy all my flowers in white and airbrush them the color I want. No the color won't bleed onto the cake.
Personally, I like to dust my roses. You either can start out with white paste or a lighter color paste that you will be dusting. I did a cake last weekend that had really pretty red roses on it. I used mostly Kiko petal dust, added some Cherry Love and then a bit of African violet. Mixed it all together and dusted away. See below...they were a really pretty, rich color.
Thank you for your help, i'll tried your method.