First tutorial!
A very long tut, I'm sure there are possible ways to get this result in much less steps, but I have no idea how.
Texture used made by me, we'll be making this
The opacity fill for each layer depends on the base, so just play around with it to see what works best for you. I hope this will be useful for at least some of you, and if you have any questions, feel free to ask me. Friend me for future tutorials if you like and please comment if you find this useful.