If you have the patience space and materials go ahead and take your door off the hinges and lay it flat on sawhorse legs.
Front door hinges paint.
You can also tape a tarp over the opening if you prefer to remove your door to paint.
Just as with the primer let each side of the door dry before turning it over to work on the other side.
Make long strokes with the brush and clean any visible lines on the front of the door with a dry cloth.
Sandpaper fine grit damp rag paint brush low nap or foam roller and roller tray screwdriver to remover door hardware quart of paint quart of primer somewhat optional explained below ready strip safer paint and varnish remover optional based on the condition of your door hard.
Wipe down the door to remove all the girt and grime.
First look for paint or paint and primer product that is labeled exterior or interior exterior front doors need to withstand temperature fluctuations rain hail snow and dirt and only.
Pick out the front door color tape hardware hinges and any glass inserts.
Depending on the condition of any old.
You can paint it on the hinges be sure to cover them in painters tape but laying it flat will help prevents drips and runs.
Give a light sanding to the entire door to give the paint a rough surface to grip.
Instructions clean and prep the door.