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painting shotcrete (similar)

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  1. #1
    Senior Member ForeverYoung's Avatar
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    Default painting shotcrete (similar)

    Have a small area, no more than 20m, to repaint that is like sprayed concrete:
    shotcrete-img_20230114_143711-copy.jpg
    Not pebblecrete, probably done in the 1920s, but a very rough uneven surface.
    Most of the house was painted white by the previous owner but I have relocated some water tanks and want to repaint white those walls, and some other missed bits like that eaves shot, (is a dirty white colour atm)

    Don't have a sprayer and hate masking so have always used a brush/roller.
    But this stuff is a nightmare to cut in and paint.
    Tried a 26mm nap roller but coverage is poor, maybe 60%.
    Tried big brush, small brush. Dabbing technique.

    Bought a 4 litre tin and didn't even get one coat on.

    Not sure buying a cheap sprayer is the way to go for such a small job.
    Hire a better quality one?

    Any tips?
    Would watering down the paint help?
    Using Dulux Weathershield Matt.
    Attached Thumbnails Attached Thumbnails shotcrete_1-1024x682.jpg  

  2. #2
    Senior Member ForeverYoung's Avatar
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    For those playing along at home - use a sprayer.
    I didn't and regret it.
    Would probably use something like this:

    Wagner Flexio 575 Paint Sprayer - Bunnings Australia

  3. #3
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    Default

    From the pics looks very much like the spray on texture coat from 1970's
    Paint shops may be able to help with today's products and applicators.

  4. #4
    Senior Member ForeverYoung's Avatar
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    Quote Originally Posted by cyclic View Post
    From the pics looks very much like the spray on texture coat from 1970's
    Paint shops may be able to help with today's products and applicators.
    Yes, looks like that in the pics but dates back to the 20s/30s. And a lot lumpier than that 70s stuff.
    I have painted rendered and brickwork before but this was something else.

    I tackled it over the weekend since I had the paint and the ladders set up.
    Only a fair job but it will do for now - outside, so dirt and dappled shade hides most of it. One of those things you notice at the time but not in 6 months.

    Went to my specialist paint shop yesterday and he actually recommended the sprayer I linked, and cheaper than greenshed of course.
    Over the weekend I did read some reviews/specs etc but impossible to decide so went ahead with the roller/brush. Thinking it is only 20sqm.
    I had a spray can of white in the shed and used that in some spots and that wouldn't even get into some of the crevices/holes.

    As they say a good paint job is 90% prep - and now I realise that also means being prepped with the right tools

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