In my testing I don't recall doing this. I can think of a few anomolies you may not want to encounter but I'd be game to give a whirl. Wish I'd seen this earlier I just tossed a tiny batch from todays test, could have stuck a little MM acryl or Tamya in there and see what happened. In reality for me personally I'd probably try artist acrylics, they're strong pigmented, grip well and mix with most media. But expensive to test with if you don't have them in stock.
But Tick is right, they sell Stynylrez colors.