Painting internal doors is one of the most effective ways to refresh the look of a space—whether in a home, office, or commercial property. While it might seem like a simple DIY job, achieving a smooth, flawless finish takes more than just a brush and a tin of paint.

At J&D Sprayers & Makeovers, we provide professional spray refinishing for internal doors across Scotland. Here’s our comprehensive guide to achieving that high-end, factory-quality finish—whether you’re doing it yourself or choosing the hands-off, professional option.

The Key to a Perfect Finish on Wood? Preparation

Before paint even touches the surface, preparation is where results are made or ruined. Here’s what needs to be done properly:

✔ Sanding

Use 120–180 grit sandpaper to remove sheen or imperfections and help the new coat adhere. For bare wood or highly varnished surfaces, go slightly coarser (100–120 grit), then finish finer.

✔ Cleaning

Always clean the surface after sanding. A tack cloth or vacuum ensures you remove all dust particles, preventing a rough finish.

✔ Priming

Use a quality wood primer to seal bare wood, block stains, and create a uniform base—especially important if covering dark colours or dealing with softwoods like pine, where knots may bleed through.

Do You Need to Sand Between Coats?

Yes. Light sanding (220 grit) between coats knocks back texture, eliminates dried dust, and ensures your next layer adheres cleanly. Wipe again with a tack cloth before recoating.

Choosing the Right Paint for Interior Doors

Your paint choice impacts not only appearance, but durability. Here’s what we recommend:

Avoid wall paint—it lacks the durability required for wood surfaces. Opt for specialist wood coatings, like PU (polyurethane) or enamel-based formulas.

How to Paint a Door Like a Pro

1. Remove or Mask Hardware

Professionals always remove handles, locks, and hinges for full coverage. If not possible, use painter’s tape and a utility knife for clean, precise masking.

2. Stabilise the Door

If painting in place, use wood shims at the base to keep the door stable. If possible, remove the door and paint it flat for the cleanest result.

3. Painting Technique

• Use a 2″ angled brush for edges and detailed areas.

• Apply paint in thin, even coats using a foam roller or spray gun for large, flat panels.

• For a smooth finish, use the “laying off” technique: lightly pass over wet paint with a dry brush to eliminate strokes and blend edges.

Flat Doors vs. Panelled Doors

• Flat (Flush) Doors: Use a roller or sprayer for large areas, with laying off for a perfect finish.

• Panelled Doors: Start with inset panels using a brush, then roll the rest. Paint each section methodically to avoid overlap marks.

Painting French Doors Without Taping Glass

Instead of taping every pane:

• Use a high-quality angled brush

• Paint close to the glass

• Wipe any excess from the glass with a damp cloth (for water-based paints)

Why Your Painted Door Feels Rough

If your door feels gritty, dust likely settled on it during drying. Always work in a dust-free area, ventilated but free from strong drafts. Sand between coats and clean thoroughly before painting each layer.

DIY or Professional Finish?

You can paint your doors yourself—but if you’re looking for:

• A flawless finish

• No brush strokes

• Perfect sheen and durability

• Fast turnaround across multiple doors

Then our spray finishing services are your best bet. We offer:

• On-site and off-site refinishing

• Full prep and masking

• PU coatings with excellent wear resistance

• Wide choice of colours and sheens

Serving All of Scotland

We work across Edinburgh, Glasgow, Dundee, Aberdeen, and surrounding regions, offering door refinishing for residential and commercial clients alike.

Want Factory-Finish Results Without the Hassle?

Contact J&D Sprayers & Makeovers
Let us make your interior doors look brand new—with a smooth, durable spray-painted finish that outlasts DIY.