White speks on my painted fence.

Discussion in 'Landscaping and Outdoors' started by Rollie, Jul 21, 2016.

  1. Mr. Handyandy

    Mr. Handyandy Screwfix Select

    I reckon it's powdered paint/stain. Mixing hasn't occurred very well, putting spots of powder instead of paint, and now washed off.

    Mr. HandyAndy - Really
     
  2. Rollie

    Rollie New Member

    I tried cuprinol on my front fence and It had to be painted after 2 years, I splashed out on a more expensive paint hoping it would last.
     
  3. Rollie

    Rollie New Member

    The paint I use is pure white when you open the tub. I use an electric mixer to completely turn the paint to its brown colour, so it was well mixed before application. The paint Has been on since 24th April and It only turned white this week.
     
  4. KIAB

    KIAB Super Member

    That's what I said in earlier reply (8), possible it's come from further afield,a airborne deposit, some airborne contaminant.

    EDIT: Been on since 24th April, I would rule out salt deposits then, sure they would have shown sooner, in a few days after treatment.
     
    Last edited: Jul 21, 2016
  5. Rollie

    Rollie New Member

    Thanks for the really quick response and help guys. I'm hoping another coat will solve it but it's really bugging me after spending all that time and effort painting and erecting the fence myself and it now looks like this.
     
  6. Rollie

    Rollie New Member

    I would have thought that myself but my garage is 2 feet away from the fence and has the same paint but isn't touched at all.
     
  7. Phil the Paver

    Phil the Paver Screwfix Select

    It is almost certainly a reaction between the paint and the wood treatment and unfortunately could continue to happen for years to come, I see it all the time on fencing.
     
  8. Astramax

    Astramax Super Member

    The very hot weather of this last few days has drawn the tanalized moisture out to the surface.
     
  9. KIAB

    KIAB Super Member

    Been reading up abit, it is most likely salts as I had thought, they can vary in appearence depending on the preservative used for pressure treatment of the timber.
     
  10. koolpc

    koolpc Super Member

    Def a reaction to the paint
     
  11. Astramax

    Astramax Super Member

    Not a reaction to the paint as one is chemical and the other a waterbased product. o_O
     
  12. koolpc

    koolpc Super Member

    Def a reaction to the paint
     
  13. Astramax

    Astramax Super Member

    Explain why and the chemical process of this reaction?
     
  14. koolpc

    koolpc Super Member

    Have you got 24 hrs to spare?
     
  15. Astramax

    Astramax Super Member

    Yes the weekend has just started!:D
     
  16. Phil the Paver

    Phil the Paver Screwfix Select

    Years ago I did some work on a barn, part of the work was cutting out an opening for a window, I made the the frame support for the window out of pressure treated 100 x 50 fencing wall plate, I then painted it in Timber Jack black barn paint, on the pressure treated section the paint never dried, even weeks later it was wet to the touch.

    It turned out to be the Chromated Copper Arsenate in the wood treatment reacting with the paint, this is all so why you have white/green spots appearing on the timber, very common in fencing.
     
  17. Astramax

    Astramax Super Member

    The OP hasn't said the paint is not dry that is why I believe the white spots are salts drying out and erupting through the applied coating, crystalized salts are quite abrasive and sharp when dry. So basically not a reaction to the paint.
     

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