I have watched experienced painters skip prep once — it was a rental property flip where the owner wanted “fast and dirty.” The paint peeled off in sheets within three months. Prep is not optional. It is the actual job. Paint is just the finishing step.
Here is the full pro prep process, room by room, from first walkthrough to first brushstroke.
1. Empty and Protect
Remove as much furniture as possible. For what stays:
- Push furniture to center of room, cover with plastic canvas or heavy duty canvas drop cloths (not plastic — plastic slips under furniture legs and creates trip hazards)
- Lay floor protection: canvas cloths for hardwood and tile, plastic for carpet
- Remove outlet and switch plate covers
- Take down light switch covers and outlet covers
- Remove door hinges and knob if you have time
2. Clean Every Surface
Walls gather layers of invisible grime over time — cooking grease in kitchens, dust everywhere, marks from kids, pencil scuffs from homework. Paint will not stick to grease.
What works:
- TSP (trisodium phosphate) — mix 1/4 cup per gallon of warm water
- Wipe with a sponge or microfiber cloth
- Rinse with clean water and let dry
- For greasy kitchen walls above the stove, use a degreaser first, then TSP
3. Repair Every Hole and Crack
Grab these:
- Lightweight spackling compound (DAP Lightweight or Similar)
- Putty knife — 3-inch for drywall
- 120-grit and 220-grit sandpaper
- A damp cloth for cleanup
For nail holes: Spackle flat, let dry, sand with 220-grit. One coat.
For cracks: These need caulk first if they are hairline drywall seams, then spackling over the repair tape. For cracks that go through paint into drywall:
- Widen the crack slightly with a utility knife so spackle can grab
- Apply spackling compound with a putty knife, pressing into the crack
- Let dry 2 hours
- Sand smooth with 220-grit
- Repeat if needed — one thick coat is worse than two thin ones
For larger holes (bigger than a dime):
- Cut a square around the hole with a utility knife
- Cut a drywall patch piece slightly larger than the hole
- Secure with drywall tape on the back
- Spackle over the tape
- Sand, check depth, add another thin layer if needed
- Sand again until flush
4. Caulk the Gaps
Where walls meet ceiling, where baseboards meet the floor, around window casings — these gaps collect dust and look sloppy if not filled.
- Use paintable acrylic caulk (DAP or similar)
- Run a thin bead along the gap
- Smooth immediately with a wet finger or caulk smoothing tool
- Let cure 24 hours before painting
5. Prime (When Necessary)
You do not always need primer, but know when you do:
- New drywall — always prime
- Patched areas larger than a hand — prime the patch
- Stained areas (water stains, smoke, marker) — use a stain-blocking primer (Zinsser B-I-N or Kilz Original)
- Dark-to-light color changes — tinted primer (see separate article on this)
6. Sand Smooth
After all repairs are dry and caulk is cured, do a final wipe-down with a damp cloth. Then lightly sand any spot that feels raised with 220-grit sandpaper. Wipe away dust. You are now ready for tape and paint.
The One Thing I Always Tell Homeowners
“Prep work is boring but it is the thing between you and a paint job that looks like it was done by someone who actually did it before.” Every room I have done that looked amazing — the homeowner always said “was it really just paint?” That is prep doing its job.
When to Call a Pro
If you are painting multiple rooms, have significant drywall damage, or want this done in a single weekend without the prep work — Deden Contracting handles every step from repair to final coat. Free estimate: (402) 915-2661.
Prep right, paint right, and you will never have a room that looks two months old again.
