revelation Posted June 15, 2021 Share Posted June 15, 2021 Hi all, I am trying to get these ‘stains’ off my oak stairs. I have been cleaning them ready to osmo oil them. I have been really careful not to spill anything. I am assuming these came from when they were fitted, and some of the D4 glue being used got on there and was then wiped off. I was wondering will these show once oiled (I’m using osmo raw). if they will what’s the best course of action? To sand them out? A product that I can use? thanks in advance. Link to comment Share on other sites More sharing options...
markc Posted June 15, 2021 Share Posted June 15, 2021 always sand before treating Link to comment Share on other sites More sharing options...
revelation Posted June 15, 2021 Author Share Posted June 15, 2021 24 minutes ago, markc said: always sand before treating Ive given the stairs a light 120 grit sanding. And that’s not removed those marks. Link to comment Share on other sites More sharing options...
markc Posted June 15, 2021 Share Posted June 15, 2021 26 minutes ago, revelation said: Ive given the stairs a light 120 grit sanding. And that’s not removed those marks. as they are stains you will need to take some material away to blur the edges. The oil will show up loads of colour differences so patches are to be expected but the ones pictured jump out. Link to comment Share on other sites More sharing options...
revelation Posted June 15, 2021 Author Share Posted June 15, 2021 40 minutes ago, markc said: as they are stains you will need to take some material away to blur the edges. The oil will show up loads of colour differences so patches are to be expected but the ones pictured jump out. What grit would you recommend to use? Link to comment Share on other sites More sharing options...
markc Posted June 15, 2021 Share Posted June 15, 2021 Just now, revelation said: What grit would you recommend to use? 120 will be ok, you dont want deep scratches to add to the marks to sand out. Use a small block and decent pressure, if it disappears easily then great, if not try a bit of oil and see how it dries. as you are using clear oil the multiply layers wont make much difference to the tone. Link to comment Share on other sites More sharing options...
Temp Posted June 15, 2021 Share Posted June 15, 2021 I wonder if its worth trying solvents like acetone. Eg clear solvents that evaporate totally. Perhaps test on scrap wood first. Link to comment Share on other sites More sharing options...
JFDIY Posted June 15, 2021 Share Posted June 15, 2021 Oxalic acid is used to clean oak, comes up like balsa wood afterwards, if you were really selective in spot treating I bet it would lighten it. Is there anywhere inconspicuous you can test first? Link to comment Share on other sites More sharing options...
dpmiller Posted June 15, 2021 Share Posted June 15, 2021 do the whole step with whatever made the stain Link to comment Share on other sites More sharing options...
revelation Posted June 15, 2021 Author Share Posted June 15, 2021 1 hour ago, JFDIY said: Oxalic acid is used to clean oak, comes up like balsa wood afterwards, if you were really selective in spot treating I bet it would lighten it. Is there anywhere inconspicuous you can test first? I’ll try that. It won’t damage or leave any kind of water mark will it? Link to comment Share on other sites More sharing options...
revelation Posted June 15, 2021 Author Share Posted June 15, 2021 1 hour ago, dpmiller said: do the whole step with whatever made the stain I am not 100% sure it was the glue, I am assuming it was so that would be risky to get wrong. Link to comment Share on other sites More sharing options...
nod Posted June 15, 2021 Share Posted June 15, 2021 If it’s a water stain cant see from pic I normally use Oxalic acid Link to comment Share on other sites More sharing options...
revelation Posted June 15, 2021 Author Share Posted June 15, 2021 26 minutes ago, nod said: If it’s a water stain cant see from pic I normally use Oxalic acid I don’t think it’s water, the only thing I think is there was some glue spill (d4) that was wiped off shortly after. would the Oxalic Acid leave any mark if I were to try it? Link to comment Share on other sites More sharing options...
nod Posted June 15, 2021 Share Posted June 15, 2021 No Paint it on and wash it off after ten minutes Repeat till the stain has gone Link to comment Share on other sites More sharing options...
revelation Posted June 20, 2021 Author Share Posted June 20, 2021 On 15/06/2021 at 20:37, nod said: No Paint it on and wash it off after ten minutes Repeat till the stain has gone move tried the acid. It hasn’t made a difference. guess it wasn’t water. Link to comment Share on other sites More sharing options...
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