Can someone provide detailed instructions on coloring a hairpiece. I haven't done this before so I'm a little gunshy. Obviously I'm mostly worried about hurting the base.

After I have my dye mix made, what do I do to ensure a good job?

How do I apply the mix
How long do I need to leave it on for?
Do I shampoo it out, or just rinse?

Any other tips/sign posts?

Thanks so much