I have done this small tutorial on applying a mint green wash to pink vinyl that might help new artists learning the art of reborning.
This is the technique I use when applying my washes and as every artist is different they each have their own special way of doing the wash.
I find some vinyl more pink than others and as I personally like to start with a nice pale colour undertone, I found by applying a green/mint wash as your first coat helps to dull down the pink in the vinyl.
