How to paint a new fiberglass exterior door?

I would use a good quality exterior latex enamel paint. It will hold up to the weather and will be washable. Be sure to clean the door with TSP or other cleaner. You shouldn't need too much prep since it is a new door. Remove door knob hardware before painting. The hinges should be covered with blue tape. You can use a small foam roller for the flats and a brush for the other trim areas. The best job will be done if you lay the door on sawhorses and paint before installation, but you have already installed the door so do it in place. Protect the floor below.

Take a good photo to the paint department of the home improvement store and ask them what will work for you. They have the best selection, the most up-to-date materials and most important, the most informative sales staff to get you what you need for a professional job. Since they also sell exterior doors, you can also consult with the door salespeople for advice.

Consult your local paint store pro

The will have the products needed to stick to the plastic moldings and fiberglass

Good free advice plus they have the products you'll need.

Check with the manufacturer 👍

I painted my front fiberglass door with Dixie Belle Paint in the color Barn Red. I did it 2 years ago and it still looks fantastic, even in the Florida Sun! After I used one coat of DBP, I did put a layer of DBP Gator Hide which gave it a little sheen and added extra protection from the elements. I have a double door and it took 1 16 oz container of paint and one 16 oz container of Gator Hide. Please let me know if you have any other questions. - Teri https://dixiebellepaint.com/

Here is a picture of a front door that was painted with Dixie Belle Paint color called Rebel Yellow.