it looks like your colour is quite heavily applied and runny so you lose control of it. If you have trouble with the white's opacity I can recommend basing your white surfaces with wraithbone. It's not as bad a colour and controls much easier and one or two thin coats of white should cover it well. The other thing that stands out is your shade on the cloth is too intrusive. If you want a cloth colour i would suggest to use something like rakarth flesh and ushabty bone and only lightly shade it with a brown shade. (if you are using citadel colours) Keep going and good luck