[Tedtalk]

I have some damaged drywall. Not bad, but some brown paper showing. The walls were textured and previously painted with oil based paint. I used an orbital sander to smooth the texture down but cannot remove the paint completely without causing damage. Question: Can I put GARDZ on the entire walls, skim coat, prime with 123, paint? Should I use GARDZ before and after skim coat? Will the GARDZ adhere to the previous oil paint that remains or must I used oil primer instead of water based GARDZ? Sorry, that was more than one question! Any advice would be very appreciated. Also, this in a bathroom that I plan to paint using BM Aura bath and spa.

 

[woodco]

Spot prime the damaged drywall with gardz. Then float the walls. Trying to sand texture smooth is a mistake. Just float new mud over it and sand that down. For $20 at Lowes, you can get a hand sander you can attach drywall screens to a shop vac to suck the dust as you go. I do this on a regular basis with textured walls before I hang wallpaper. With a good bag in the shop vac its virtually dust free. I use lightweight joint compound, and 220 grit screens, sanded at an angle, or else you will see the screen marks in the wall. Once the wall is sanded and smooth, gardz the whole thing, to make it bullet proof. There will still be some screen marks, so repriming with something thicker like 123 is a good idea on top of the gardz.

You dont HAVE to gardz the skim coat, but I like to, because it penetrates the surface and makes it bullet proof. 123 will work as well, as long as you get the dust off the wall. With my shopvac sander, I dont worry about it, though, but wall dust is much less of a concern with Gardz, as it will straight up penetrate a little into the wall.

Wiping the wall down with damp rags will help with the sanding marks though. Generally, three rolled coats will cover the marks though, but you want to diagonally sand. OR, if you arent concerned with dust, you can sand again with actual sandpaper, and it wont leave the marks.

 

[Tedtalk]

Thank you so much for the advice!

 

[Biscuits]

So you want to use that expensive BM aura? And then cheap out with that garbage known as 123 as primer?

Use the gardz on the torn paper. Wash the walls. Prime with an oil alkyd that can be sanded. Then put your aura on.

Gardz does not go on oil.

 

[Tedtalk]

Can you recommend a primer you would use over the oil paint (after putting GARDZ over the damaged areas) both before and after the skim coat?

 

[woodco]

So you want to use that expensive BM aura? And then cheap out with that garbage known as 123 as primer?

Use the gardz on the torn paper. Wash the walls. Prime with an oil alkyd that can be sanded. Then put your aura on.

Gardz does not go on oil.

123 is not garbage in the slightest....

 

[woodco]

Can you recommend a primer you would use over the oil paint (after putting GARDZ over the damaged areas) both before and after the skim coat?

You dont need to prime before skim-coat, just gardz the damaged areas. 123 will work just fine, even over oil. Its a good all around workhorse universal primer. Theres better primers, sure, but its far from garbage.

 

[Biscuits]

Ben Moore all purpose alkyd primer is fine. 024

https://www.benjaminmoore.com/en-us...og/fspip/fresh-start-premium-interior-primers

If you want to get fancy you can use 217.

You'll want to saturate the damaged areas of drywall with gardz.

I don't think you need to use primer before skimming. But do wash the walls of all the bathroom grime.

 

[Biscuits]

123 is not garbage in the slightest....

123 leaves a lot to be desired. Such as being able to be sanded. IMO any primer that cannot be sanded is junk.

 

[cocomonkeynuts]

123 is not garbage in the slightest....

123 leaves a lot to be desired. Such as being able to be sanded. IMO any primer that cannot be sanded is junk.

BM primers don't exactly sand that great either. I don't stock it but 123 is a decent primer.

 

[Biscuits]

The 217 undercoater sands exceptionally well. BM's other all purpose alkyd primer sands pretty well too. I have no idea about their water based primers. Those probably don't sand well.

Before I knew anything about anything I fell into the trap of "123 is the best thing since sliced bread". Had a small repair. Primed it up with 123, because there was a whole pallet on sale at the Ace Hardware, for something like 17 dollars a gallon. Let it cure. Went to sand it smooth and it was like trying to sand soft rubber. The paper just gummed up, and everything looked like hell.

 

[cocomonkeynuts]

The 217 undercoater sands exceptionally well. BM's other all purpose alkyd primer sands pretty well too. I have no idea about their water based primers. Those probably don't sand well.

Before I knew anything about anything I fell into the trap of "123 is the best thing since sliced bread". Had a small repair. Primed it up with 123, because there was a whole pallet on sale at the Ace Hardware, for something like 17 dollars a gallon. Let it cure. Went to sand it smooth and it was like trying to sand soft rubber. The paper just gummed up, and everything looked like hell.

Again 123 preforms adequately as a general purpose primer at $17/gallon.
217 primer is near $60/gallon.
046 and n023 around 45 and still gum up paper too

 

[woodco]

The 217 undercoater sands exceptionally well. BM's other all purpose alkyd primer sands pretty well too. I have no idea about their water based primers. Those probably don't sand well.

Before I knew anything about anything I fell into the trap of "123 is the best thing since sliced bread". Had a small repair. Primed it up with 123, because there was a whole pallet on sale at the Ace Hardware, for something like 17 dollars a gallon. Let it cure. Went to sand it smooth and it was like trying to sand soft rubber. The paper just gummed up, and everything looked like hell.

Well, you must be giving your walls the rolls royce treatment if you're sanding that much. Most people dont. I sure as hell wouldnt use 123 on cabinetry, or anything I was planning on sanding the crap out of. For me and walls, all I do is a light pole sand to get any boogers off, so 123 works just fine.

 

[Biscuits]

Cost of primer is not relevant. The overwhelming majority of the cost of a paint job is the labor.

However, if I lived in a 40 year old single wide trailer with a leaky roof I would probably not even spend as much as 17 dollars a gallon on 123, and would hope to find some chinese primer at the dollar store.