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How do I repair peeled paint without repainting the whole wall?

Old paint. Was exposed to moisture under a window and a few other places. In bedroom. How can this be addressed without removing all paint in the room? The new paint is too white and apparently the peeled off paint had multiple layers.

ignore the color balance, it is actually white.

I have a bucket of paint,

British Paints Clean And Protect Matt White Interior Paint

Advice would be appreciated! Thank you!

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Jewelleryrescue

Hi ST22

I feel your pain not wanting to do whole area. I had a failed waterproofing and went through a week of heavy sanding with an angle grinder gulp. Your photos look like a Concrete wall? Maybe old style horse hair plaster? Well the pros will want you to scrape it back to bare wall in total which maybe best long term. However you can gamble a bit and try simply patch that failed paint section. But look for more than one failed patch just in case. It looks like older paint with dirt/dust layer a good 10 min hand sand before 240 grade sand paper on paint wouldnt hurt,

All those layers of paint you mentioned are a sign the this problem has just being repeatedly painted over in the past and if it refailed yet again and the first layers of paint arnt sticking to the wall no additional coating with work longer term if you living there and not selling I would hate to do this job twice so all the old paint needs to come off ideally if all the old paint bad.

Well firstly lets hope assume the water issue is fixed other wise paint will never stick and you must remove all paint and use a water proof cement paint made from eg bondcrete mixed with cement powder to stop water coming through the wall as a bi directional barrier. Cement paint can also be tinted some basic colours so once applied no painting required. Cement paint will be finished rough like cement. Low skill level required just apply cement paint with straw like brush stiffer bristles than ordiany brushes and slap it on 0,5mm thick approx. or 2 coats dryed in between layers.

Lets gamble you only need to scrape of all the loose paint and test the paint all over the wall if only a few patches of paint is flaking you might be lucky and save alot of effort. The gamble is the new or old paint fails again. Scrape / sand paint back until you hit paint that is hard to remove firmly stuck on. You can use a scraper to apply small tub of ready mixed gyprock finish plaster to fill the void where the paint layers peeled out of to level the wall flat again. Tip dont do a perfect filling creating a perfect flat sanded finish here as wall is dimpled else where and the flat spot repair will stand out when painted. Add imperfections to try match wall texture. The wall is bumpy so an electric sander will only partially work. A round wire brush on a drill might work better if needed. Wear goggles and dusk mask.

Ideally use an under coat to help you paint bond matched to the wall type you have. But some new paints are designed as no under coat required. As you are using a white interor paint you may need more than a undercoat but a stain blocker under coat as darker stains might come through new paint even after 5 coats of new paint. dont stress untill this happens. a blocker can be applied any time mostly.

Heres a thought some times to save time and painting i just used ordinary vinyl self adhesive contact paper roll on walls 100s patterns out there but some are cheaper than others for a whole wall. Plus you get bored with a print replace it but they can fall off is paint underneath really flaky or damp. Wall panelling, tiling or new gyprock may work if there is no water leak any more and may add an improved look but can be more expensive. More out of the box Ideas I would even consider contact glueing vinal floor sheeting or carpet on the wall as they come in thin 2mm in nice patterns but not for the beginner for others reading this.

Best look paint the whole wall section corner to corner top to bottom as it is to hard to perfectly match and blend old paints using a 10mm furry roller will give a more textured look to blend with old wall. From the photos the whole wall needs repainting.

If you only wish to try a small repair paint the centre of the repair and paint outwards all directions allowing paint on roller/brush to run out feathering/blending/fading the new paint into the old with no clear paint lines/borders

MitchellMc

Hi @st22,

It's wonderful to see that you're already received a comprehensive reply from @Jewelleryrescue. They cover many of the issues you might run into and appropriate fixes that you could try.

This damage is pretty standard in older houses. I had this sort of damage on all walls and ceilings of the house I rent. My method was to take a scraper and chip away at the paint until I reached solid and well-adhered paint. I then filled the areas with Poly 310g Bathroom And Kitchen Filler. After the filler was dry, I sanded the areas and undercoated them. Once the undercoat was dry, I painted. As mentioned by @Jewelleryrescue, you'll need to stipple the plaster filler to mimic the wall's rough surface.

Have a look at How to repair a water-damaged ceiling, as the process will be very similar. As long as there is no moisture left in the wall, I'd be inclined to spot repair removing only the compromised and flaking paint, filling, priming and painting over the whole wall. That way, you don't have to worry about matching colours, and if the repair fails, you can look at removing more of the damaged paint.

Please let us know if you have any questions.

Mitchell

st22

https://www.workshop.bunnings.com.au/discussion/comment/23271#Comment_23271

"chip away at the paint until I reached solid and well-adhered paint" that exposes the cement

"filled the areas with Poly 310g Bathroom And Kitchen Filler." This is for dents up to 10mm. Is it suitable for 0.1mm shallow and large areas like the one shown above?

'I'd be inclined to spot repair removing only the compromised and flaking paint, filling, priming and painting over the whole wall' this looks interesting, thanks.

More details - this is a rental, the previous agent was willing to paint whole room, I would rather not (if possible) as they would use it as excuse to increase the rent and I understand the spot repair would be sufficient?

Thanks.

MitchellMc

https://www.workshop.bunnings.com.au/discussion/comment/74354#Comment_74354

Hi @st22,

You'll need to scrape and chip away the compromised paint until it's removed, exposing the cement. In my case, it exposed the bare plaster. The clarify my statement above, I removed the paint in an outward direction until that layer of paint became solid. I did not dig down through the paint until I reached a solid layer beneath. You'll be making the damaged section larger by ridding it of loose paint.

The Poly bathroom and kitchen filler is suitable, but you could also use UNi-PRO 500g Smooth Coat Skim Filler instead. The smooth coat is likely a slightly finer particle and is designed more specifically as a skim coat.

It is possible to spot repair and paint only those areas, but they will always be more noticeable than if you'd painted the whole wall.

Mitchell

Jewelleryrescue

https://www.workshop.bunnings.com.au/discussion/comment/74354#Comment_74354

Hi @st22

I am glad you filled the areas in and you project is meeting your goals.

Ok concrete wall as per your new photo some thing is causing paint to peel like that or a poor quality paint used with out under coat. Under the paint looks white almost powdery I would consider using Bondcrete to seal the cement wall binding loose particals giving maximum bonding strength to paint or tile for others just about any thing also providing water barrier (not an official wet area barrier) if needed . Bond crete is great value for money at bunnings and is mixed with water . 1 part Bond crete to 4 parts water gives 35 square meters per bondcrete litre. A stronger binder would be 4 parts Bond crete 1 part water giving 8 sqm just slap it on with brush before under coat. wash up soapy water wear gloves. This is a basic skill level. If your wall is badly textured you can even add cement powder to the mix to a tooth paste consistancy and fill smooth the wall for a smoother new wall finish but not recommended for the beginner. First paint wall with bondcrete use internet for more bondcrete application instructions. https://www.bondall.com/concrete-additives/bondcrete/

Another approach to your land lord is to offer (neg as they may have similar reno plans) to do certain house renos for a rent reduction while you are living there probly best to itemise agreed renos as you wish to do and as the owner agrees you have a win win situation. ie you have permission from land lord and rent reduction. Not all land lords will be open to this but worth a try to sound them out with a few baisc improvments first. A pre neg may work best at start of a new rental and in todays tight rental market an offer of live in reno work may see you pip out other rental contenders for a decent property to rent. Another bonus to you is it will help you practice new skills and grow to do more bolder projects if you wish ready for you new home ideally. I did this with my flat owner via a real estate agent and managed a $50 rent per week reduction for 2 years untill i left. The real estate office said you do handyman work I said yes and they started giving me odd jobs repairs for many properties in there care so it was an interesting turn of events on weekends and some evenings. But not for every one. Ps good work on your current project . Some of this info is for other readers too.

EricL

https://www.workshop.bunnings.com.au/discussion/comment/100748#Comment_100748

Hi @Jewelleryrescue

Thank you very much for the detailed advice on using Bondcrete. Let me tag @st22 to make sure they are aware of your suggestions. I totally agree that using Bondcrete is an excellent way to bind the materials in the wall.

Eric

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