How to prep/paint fully mudded drywall

Old 09-09-14, 09:51 PM
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How to prep/paint fully mudded drywall

I have a small section (probably 6 sq ft) of repair that I did in my bathroom. It is a combination of drywall and vinyl bullnose corners. The entire surface of the new drywall is covered in several layers of mud. The remaining wall that it connects with still has the "aqua born ceramic" flat color paint on it. I'm going to paint over the whole thing but I just want to make sure that when I do it all looks consistent. I've read so many conflicting thoughts on how to prep new drywall. Some say to prime, some say to just paint. Then even within the "prime it" group there are tons of different thoughts on what to use - a SW product, Gardz, etc.

So how should I prep the new section, and do I also need to apply this same prep to the already painted section?

Any advice would be greatly appreciated!

Old 09-10-14, 04:20 AM
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Normally existing paint doesn't require a primer before being repainted. Gardz is a specialized primer and while it could be used, it's tailor made for sealing raw gypsum [what's under the drywall paper] and/or wallpaper adhesives.

Once you are convinced the drywall finishing is right, brush or wipe off the sanding dust and apply most any interior latex wall primer. Pay attention while the primer is wet as it will point out any defects in the drywall finish. You can go back and remud, sand and reprime those areas after the primer dries.

If this is a bath w/shower you need to use a latex enamel for the top coat [any sheen] a bath paint is even better as it has extra mildewcide and is formulated for the harsher environment that a bath rm sees.
Old 09-10-14, 06:07 AM
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It never hurts to give painted surfaces a light scuff sanding before re-painting, especially if the existing paint is high sheen.

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