The Feast Watson product is a great finish it will tone down the white wash look still leaving the timber shining through. the only down side is, if is going over an old polyurethane finish you may have some trouble with adhesion, it would pay to try a small area as a test first, there is nothing worst than seeing paint peeling off due to adhesion problems and it's a major fix up after. Good Luck.

I've been successful removing acrylic paint from glass with metho or vinegar and a good amount of elbow grease/thumb nail...

I'd like a picture of the entire front of your house , including the front door . Having said that , from those two inside shots , I'd tend to think a crisp white paint for the surround ( including around the windows ) BUT leave the door in that stained tone . Okay , if it has weathered , them maybe sand back and restain and revarnish etc , but it is a natural timber door , I assume it works in with your outside decor and materials -- paint is what you use to hide stuff -- why hide the door when it looks like that ? Change for changes sake doesn't achieve much IMO -- you do it if it will improve your house , and I'm sceptical whether it will . . . . . .

You can anything you like these days. Aluminium doors with wooden windows, or aluminium windows with wooden doors. The profile of the aluminium window is the difference between looking good or not. The aluminium window just needs to be a wider frame to match the usually more chunky wooden doors.