Lifting paint

Piscator · Post by **Piscator** » Tue Oct 01, 2024 2:17 pm

Hi everyone,
I’m hoping some of you guys might be able to help?
I’d put tesa yellow tape around the patio doors before caulking and when I peeled it off the old paint just lifted away!
I’m going to be repainting the room but need to know the best way to repair the damage.
Photos included so you can see what’s happened.
Many thanks

https://www.dropbox.com/scl/fi/qwrhk9wx ... 4izcl&dl=0

https://www.dropbox.com/scl/fi/78at0yhl ... z3nl6&dl=0

moderator2 · Post by **moderator2** » Tue Oct 01, 2024 2:28 pm

Better to attach the pics.

Piscator · Post by **Piscator** » Tue Oct 01, 2024 2:47 pm

Sorry I couldn’t work out how!

wine~o · Post by **wine~o** » Tue Oct 01, 2024 4:42 pm

looks like the original paint was missing a mist coat, as a result the top coat/s have not adhered properly. ( A mist coat is a thinned down layer of emulsion applied to bare plaster) Bare plaster is highly absorbent, if you go over with a full undiluted coat the plaster sucks all the water up and leaves a layer of pigment that is easily removed by tape.'

Sand back as best you can, apply a coat of emulsion (TRADE) thinned by 10-20% leave to dry then over paint.

Piscator · Post by **Piscator** » Tue Oct 01, 2024 4:52 pm

Even rubbing down will it not leave an uneven ridge between the existing and the thinned emulsion?

wine~o · Post by **wine~o** » Wed Oct 02, 2024 7:02 am

when sanding feather in the edges, when painting drag the brush back towards you after doing your up/downwards strokes. it shouldn't leave a noticeable ridge.

Piscator · Post by **Piscator** » Wed Oct 02, 2024 7:30 am

That’s brilliant thank you for the advice

Piscator · Post by **Piscator** » Wed Oct 02, 2024 10:05 am

Just a thought would it be ok to use BIN instead?

dewaltdisney · Post by **dewaltdisney** » Wed Oct 02, 2024 10:25 am

I was going to suggest a water based undercoat to seal it. Zinnser Gardz would be better than BIN here.

DWD

Piscator · Post by **Piscator** » Wed Oct 02, 2024 10:38 am

I’m going to be using Littlegreen intelligent matt, could I use that thinned down?

dewaltdisney · Post by **dewaltdisney** » Wed Oct 02, 2024 11:04 am

I see it that the lifting was caused by the tape. It would indicate that the paint under was not bonded well but that does not mean that if you paint over it will peel off on its own. I was saying a bit of water based underocat like you use for the trim would act as an adhesion promoter but in all probability emulsion will do it alone. I always think that the dried emulsion on a stirring stick seems well bonded. You need to watch changing areas of absorption as you can get ghost marks showing the undercoat.

DWD