Tools, Materials, and Prep Checklist

Success in any exterior painting project relies entirely on thorough preparation and the quality of your supplies. Skimping on materials often leads to peeling, bubbling, and premature fading, which forces you to repeat the entire process the following season. Expect to spend between $75 and $120 for premium supplies, depending on what you already have in your workshop. You only need one quart of paint for a standard door, so this is the perfect opportunity to invest in top-tier brands.

Before you begin, gather the following essential tools and materials:

The Material List:

One quart of premium exterior paint. Choose a high-quality acrylic latex blend formulated specifically for doors and trim, which allows the finish to flex with temperature changes rather than cracking. Semi-gloss or satin finishes work best because they wipe clean easily and highlight the architectural details of the door.

One quart of high-adhesion exterior bonding primer. If you are painting over oil-based paint with latex, or painting a bare wood or fiberglass surface, this step is absolutely non-negotiable. Ask your paint supplier to tint the primer gray if you plan to use a dark topcoat.

Trisodium Phosphate (TSP) cleaner or a heavy-duty degreaser. Your door collects an astonishing amount of hand oils, exhaust soot, and pollen; paint will not adhere to this invisible grime.

The Tool Kit:

A high-quality 2-inch angled synthetic bristle brush for cutting into corners and painting recessed panels.

A 4-inch high-density foam roller and a small rolling tray. Foam rollers eliminate brush strokes and lay down a smooth, factory-like finish on the flat surfaces of the door.

Sandpaper in 120-grit and 220-grit. You need the 120-grit to scuff the old glossy finish and the 220-grit for sanding between your fresh coats of paint.

Heavy-duty painter’s tape, a canvas drop cloth, and basic hand tools including a screwdriver and utility knife for removing your hardware.

Preparation and Safety Callouts: Always check the weather forecast before starting. You need two consecutive days with temperatures between 50 and 85 degrees Fahrenheit, with low humidity and no rain. If you live in a house built before 1978, you must test the existing door for lead-based paint before doing any scraping or sanding. You can find safe handling protocols through the EPA guidelines on lead paint. Wear a well-fitted dust mask and safety glasses while sanding, and work in a well-ventilated area.