How To Remove Paint From Concrete Window Sills
- #1
The exterior window sills in my house are concrete plinths and have been painted in the past. The paint is peeling very badly and I want to strip information technology back and repaint.
Using sandpaper seems like a waste of time, and I have tried using a wire brush to scrape the more flakey bits off but they dont really seem to want to come.
I was therefore thinking of getting something like
https://world wide web.amazon.co.uk/Silverline...d=1463569599&sr=viii-3&keywords=drill+wire+castor
and using it on a cordless drill (as I need to do the upstairs window sills)
Do you recall this would practise the chore.
You tin but brand out the sill in this picture
- #2
jpaul
- Joined
- 1 Mar 2010
- Posts
- 17,239
I think I would try a rotary castor, which are easier to control in a power drill in restricted environments I found, and you can easily see your progress , not sure if steel would be besides aggressive versus brass wires since I have never removed paint from physical .... plus the safety goggles of course .. maybe someone will say if at that place are expert chemical solutions.
- #iii
I had the misfortune of doing this on the sills on our last house. They were in backlog of 100 years erstwhile and were covered in layer upon layer of paint to the point that the texture of the sill was lost entirely. The easiest style to strip them is also the most messy i.e chemical stripping. You can make an inexpensive poultice using caustic soda, flour and h2o. The flour just helps course a paste. Apply liberally to the sill and cover with cling film to stop it drying out. Make sure you cover yourself top to bottom unless you want a free and painful tattoo! Nitromors or similar volition work, only you will spend a small fortune buying off the shelf. Make sure yous clean the whole sill thoroughly before painting.
You tin can buy off the shelf kits that work on similar lines equally the abode fabricated stripper, though achieve much the same result.
I did utilise a multifariousness of wire wheels in the first instance, just constitute whilst they volition remove the flakes, they volition merely polish the non flaking bits.
Alternatively simply practice what most would practise and remove the worst of the loose stuff and just paint over 
- #4
jpaul
- Joined
- 1 Mar 2010
- Posts
- 17,239
I assume a pressure washer would not piece of work, with the power heads I accept inadvertently removed paint on outside return of a business firm (but I doubtable it would utilize too much water and exist difficult to command without breaking a window say.)
- #5
Cheers
Think I will take hold of 1 of the wire brush things as they are only £3 and I can have one for the weekend.
Not certain on chemicals, I used some of that peelaway stuff previously in the house on old gloss and it was pretty proficient, simply it is expensive.
I a trying to remember to a yr ago when I did the ground flooring sills and I call up I just used a normal scrubbing brush to go off the worst then painted over the non flaking bits (and then volition probably end up doing that again, specially equally information technology is the upstairs this time and and then not exactly close to the eye ).
Pressure level washer is out as 1 I retrieve information technology will exist too much for the area and 2 I am non lugging a pressure washer upwardly a ladder
- #half dozen
Orifice
- Joined
- 1 Oct 2002
- Posts
- 5,532
You lot could rent a needle scabbler, might be overkill for the minor amount you lot have to exercise.
- #vii
Yes probably. I do have a 4" grinder I could try too, but that currently only has a standard 6mm grinding disc on it.
- #8
In and industrial environment this would exist a classic task for a high presure jetter, high energy low menses rate great for removal coatings without dissentious the substrate.
I once got some guys in to do jetting at 25,000psi (yes thousand or 2,500bar) they had to habiliment kevlar trunk armour and have a 2 man expressionless homo switch fix for safe. Removed the coating left the contumely untouched.
- #9
Nitromors, a handheld wire brush (for agitation) and a hosepipe?
- #10
jpaul
- Joined
- 1 Mar 2010
- Posts
- 17,239
400ml of nitromors >£8 and as suggested will demand to make a poultice and go along it wet whilst it does its stuff , potentially on underside of ledge too
Source: https://forums.overclockers.co.uk/threads/removing-paint-from-outside-concrete.18731580/
Posted by: machadothriff.blogspot.com
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