Ok so whenever, I make 50/50 (half gumpaste half fondant) i end up with all of those little pebbles of gumpaste in the mixture. Is this normal? Oh, I use Satin Ice and wilton ready-to-use gumpaste if that makes a difference.
I find that Wilton gumpaste is kind of hard and crumbly on the edges, especially closest to the opening, even if you are opening the package for the first time. (I really need to find other gumpaste to use but I've used it because it is convenient.) Anyway, it helps if you break some of that off and use the softer GP in the middle. And as diane mentioned, make sure you knead it a lot.
We had this problem in the fondant and gum paste course. (All of us in the class)
If you don't want to work too much on it, buy the gum-tex and add a teaspoon to half a cup of fondant. It works the same way. It is powder, you just need to work the powder in to the fondant.
My favorite mix is 1 tsp. of Tylose powder to 12 0z. of MMF. Our Wilton instructor gave us that recipe even though she probably wasn't suppose to!!!! I just measure a piece of the fondant and flatten it out some. Then I sprinkle on the Tylose and work it in a bit. Wrap it in plastic wrap and leave it sit overnight. If it is a little stiff sometimes, I just put it in the microwave for a few seconds.
Lily
You should try Satin Ice Gumpaste. You'll LOVE it! It is as pliable as their fondant once you kneed it and is great to work with! I still have a bag of Wilton's gumpaste in the cupboard, don't think I'll ever use it again.
Good Luck!
Tammy 
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