Wall Prep 101: Mudding, Sanding, and Priming for a Pro Paint Job (Bathroom Update)

Hey, it’s Steve from CT Home Repair and Tutoring LLC.

The bathroom conversion is moving along—framing done, electrical and insulation in place, and now it’s time for the walls. Today I tackled the mudding, sanding, and priming on the first section. This is the unglamorous step that makes everything look sharp later, and it’s easier than it seems if you take it slow.

I took pictures of it so you can see how to get a smooth surface without fancy tools or pro skills. If you’ve ever stared at a bumpy drywall seam wondering where to start, this is for you.

What You’ll Need (Basic Stuff)

A 6-inch drywall knife, joint compound, mesh tape, 120-grit sandpaper, primer, and a paint roller. That’s it—no special gadgets required.

Step-by-Step: From Rough to Ready

Step 1: First Mud Coat

Applied mesh tape over the seams and a thin first coat of compound with the 6-inch knife. Worked it smooth but didn’t worry about perfection—this coat is just to fill gaps.

Wall mudded once, showing the rough first coat over seams and screws

Step 2: Second Mud Coat and Sand

Let the first coat dry overnight, then added a second layer, feathering the edges for a smooth taper. Sanded lightly with 120-grit to knock down high spots—dust mask on, because it gets everywhere.

Wall mudded twice and sanded, ready for primer with smooth surface

Step 3: Prime It Up

Rolled on Kilz primer (tinted gray for better coverage on drywall). It seals the surface and helps the paint stick—two coats if you’re going dark, one for light colors.

Wall primed and ready for paint, showing the smooth gray surface

What I Learned (and Why It’s Worth It)

A little patience with the mud coats pays off big—smooth walls mean less primer and paint, and no visible seams later. This section is now ready for color (debating a soft blue or gray—thoughts?).

Next: Finishing the mud on the rest of the walls, then paint. Stay tuned!

What’s your go-to primer for drywall? Drop it in the comments — I’d love your tips.


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Happy building,
Steve
CT Home Repair and Tutoring LLC

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