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Help! Brush marks in undercoat!

Discussion in 'Decorating and Painting' started by DIYBeth33, 11 Jul 2015.

  1. DIYBeth33

    DIYBeth33

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    Hi!

    I've been undercoating my stairs (the triangle sides) to hopefully satin finish sometime next week. However, I seem to have terrible brushmarks in the dried undercoat. I paint stripped the original dodgy paint job off and sanded it all down, so it was nice and smooth, before applying 2 coats of undercoat (sanding between coats) and now want to topcoat.

    But I find myself sanding it back again to smooth out the brush marks, so will then need to undercoat again as it looks patchy! Aaaggghhhh I feel like I am living Groundhog Day with this, it is beyond frustrating!

    Can anyone tell me where I'm going wrong? Any tips? I am just a diy-er, so have no clue where I am going wrong with this!

    Any help would be much appreciated! Thanks! :)
     
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  3. joe-90

    joe-90

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    You need to thin the paint by about 5% - 10%, then apply the paint with the grain. Then when you brush is nearly dry, lightly drag it across you paint then leave it alone.
     
  4. DIYBeth33

    DIYBeth33

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    Thanks for the reply! Sorry if I'm being thick, but what would I thin the paint with? Is it ok to thin undercoat?

    Sort of wish I'd never started this project! Seems I'm covered in paint/dust all the time and going round in circles! :/
     
  5. Bosswhite

    Bosswhite

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    If its an oil based undercoat,White Spirit,
    If its water based undercoat, Water
     
  6. DIYBeth33

    DIYBeth33

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    Ok! Thanks for the help! :)
     
  7. phatboy

    phatboy

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    And resist the temptation to go back and retouch a bit you did any more than 3 minutes ago, it will drag the paint off the surface and cause endless amounts of swearing :(
     
  8. DIYBeth33

    DIYBeth33

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    Lol! Ok, I will try not to re-brush bit's I've already done, have been following joe's advice of brush it, then leave it alone. Seems to be working! :)
     
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