The fiberglass front door needs stripping in order to restain and finishing with top coating. Steps,products to use?

I am going to try to stain my cedar sided home. It is a 2 story house. Do I need to powerwash it first? If yes, do I need to use some type of cleaner with the power washing? If power washing is needed, how long does it have to

I just painted my walls with a dark green base. Then I mixed a quart of light green paint with a gallon of faux glaze and sponged over the dark green. I hate it and want to start over with a light color scheme. How do I prepare the dark