Remove hinge before painting front door?

Yes! I just painted my in black chalkboard paint because I wanted to write on it with fun stuff. I didn't take it off the hinge and the paint was dry enough to close in an hour. I didn't put a door stopper under the door to keep it open so it didn't move while I was painting it.

Yes, you can! Put Blue Painter's Tape around the frame of the door, keep door open while painting and use a drop cloth of some sort. Very easy project to do...

https://www.uglyducklinghouse.com/hinge-help/

Mask it off with a good masking painter's tape. Paint. Remove the tape. Make sure you go around the edges so they seal up and don't start to peel.