I'm currently working on a model (the void dragon). And I'm not very good at painting staff so far... so I'm really not sure. I used Vallejo paints as base but I don't have two colors of the same paint that I wanted to use for the details. Can I apply details with acrylic markers over another paint? Or is it a bad idea and I need to buy colors I need? I have acrylic markers from these art supplies store. Can somebody tell me what is better to do?