Showing posts with label plaster. Show all posts
Showing posts with label plaster. Show all posts

Sunday, June 24, 2007

not so stubborn paint

Having exhausted the hi-tech options, we tried the low-tech ones...

It turns out that simply spraying the recalcitrant paint with plain water (not the water & vinegar mix that was left in the spray bottle - that reacts with the plaster), leaving it a minute then applying the scraper gets 90% of the paint off. Much of the rest is the "washable green" layer that wipes off with a damp cloth.

So the remaining part of the hallway took about four people-hours, as opposed to the 8-10 (with much dust) or 20 (with heat gun) it would have taken otherwise.

It still needs to be sanded I think, to level out the rough spots, and needs many little pock-mark holes filled in, but it could be painted once the holes are filled and look alright.

The main hallway looks like it could be done in a day using this method. :-)

Stubborn paint

Removing the residue of the paint on the plaster walls.

The walls are not flat (that's 50 year old plaster for you), so both scraping and sanding takes much longer than it would otherwise. The plaster absorbs the heat from the heat gun, which means the paint is much harder to remove than it is from wood.

With the heat gun, followed by washing the green residue off the wall.

This patch (below the line, which is about 5 feet up) took about four hours.

This was after fixing the toilets yesterday, and I learned some things that might make it go faster in future: the angle of the scraper makes a huge difference for example, and the heat gun gradually gets more effective the longer it's on - it doesn't reach its highest temperature for several minutes it seems.

A (small) section of this was done with a blowtorch rather than the heat gun. (See what happens when I'm away? Walls are SET AFIRE. - S.) This is somewhat faster - the heat is more focused and direct and the paint just blisters off, but it does leave faint scorch marks on the plaster itself.

This is the opposite wall of the hallway, after about 1:45 hours with a power sander.

The sanded wall is considerably smoother, with some of the unevenness of the wall reduced. It produces a lot of dust however, even with the dust catcher attachment.

The little bit above the line, on the left near the corner, that looks green was done with the heat gun and scraper, to do a compare, that's what it looks like before washing off the green.

Given the thickness of some of the remaining paint, a thicker primer is not going to help.

Adding a surface skim of plaster would solve both the residue, the unevenness and the remaining pockmarks.

Wednesday, June 13, 2007

Plaster! (again)

Yesterday's disheartening moment came during the project of removing the faux popcorn ceiling in the kitchen.

It did have to go -- the PO applied it badly. It looked like uneven cake icing, with great peaks and waves along all the edges in much greater quantity than that which graced the rest of the ceiling.

I know, I knew, that this spray-on popcorn is generally used to hide some greater flaw. I did not expect this 'flaw' to be a poorly repaired four foot hole in the ceiling and crumbling plaster walls above the stove.

The project was eased, for the most part, by the fact that rather than scraping all the icing off I was able instead to just peel the thick layer of paint underneath it off, the icing coming with it. But then I reached the Hole. My scraper met resistance. There was no paint underneath this section of icing. There was...drywall?

I gave up on that section for the time being, as I couldn't scrape the icing without scraping the drywall as well.

I started on the lower sections of ceiling, also popcorned, over the fridge, sink and stove. I ran into trouble when the top coat of the plaster began peeling off along with the paint. Over the stove, the top coat simply shattered and fell off at the touch. So there's a four to six foot section of upper wall/ceiling that either has no finish coating or has finish coating in imminent danger of falling off. The brown layer of plaster is worryingly crumbly/fragile to the touch, there are cracks in it, and there's a distinctive brown/rust stain that looks like the mesh layer inside the plaster. Water damage, yes? That would explain the repaired hole in the ceiling, too (although it would have to be a LOT of water).

So much for painting the kitchen anytime soon.

Broken Plaster

Apparently, plasterers are rare and expensive these days. I really dislike the 'hide it with drywall' idea. I want to have the plaster fixed, not hidden. I don't feel capable of doing this myself, though I'm sure that's the most cost effective way. I'm not sure how much of the brown coat would have to be knocked out to make the repair... Presumably the cabinet would have to be removed, too. augh. (And the tile above the stove? And the hood fan??)