"re-saw" already painted boards?

[fimpan]

Maybe a crazy thought but...
I have a long fence, planks that are pressure-treated and have been mounted for probably 15 years, and the actual "wood" is fine.
These boards are painted, however, and everyone knows how it goes with painting pressure-planed wood - nothing sticks after 2 years.
A thought that came up, would it be possible to remove all the boards and reuse them by "sawing" them again in some way to get that "sawed" surface that makes paint adhere?
= newly sawed surface and then paint again.
It would probably save a lot of money and be a win-win for the environment instead of throwing away a couple of hundred meters of wood at the tip...

 

[fribygg]

Maybe it works, if you have plenty of time and a table saw you can try it

 

[Chokladmonster]

Feels much easier to plane the boards with an electric plane than to saw them with a table saw. Paint adheres to a planed surface as well; it doesn't have to be sawn. Otherwise, you wouldn't be able to paint windows. But if the paint has come off due to moist timber, I would plane the surface and then let the timber dry before painting it again.

 

[fimpan]

It feels much easier to plane the boards with an electric planer than to saw in a table saw. Paint adheres to a planed surface as well, it doesn't have to be sawed. Otherwise, you wouldn't be able to paint windows. But if the paint has chipped off due to damp wood, I would plane the surface and then let the wood dry before repainting.

Is it possible to get that "sawed" surface with an electric planer?
The wood is dry as a bone, I've already repainted it once, but it's so planed that it's almost "shiny"
So it simply comes off after a while, also tried with primer but no luck.

 

[useless]

The problem is not because the surface is "glossy". As mentioned, it's perfectly fine to paint, for example, planed window frames, planed paneling, or furniture.

 

[fimpan]

The problem is not because the surface is "glossy". As mentioned, it works perfectly fine to paint, for example, planed window frames, planed panels or furniture.

Ok, then I have been unlucky with 25 meters of plank as all the paint comes off & it's, as mentioned, bone-dry & I've tried different outdoor paints but it doesn't stick.

 

[haha5810]

Have you tried Trebitt oil stain? Using it on pressure-treated wood - never peeled

 

[fimpan]

Have you tried Trebitt oil stain? I use it on treated wood - never failed

Nope, but it might be difficult when it's already painted white & then switch to stain.

 

[fimpan]

Maybe belt sanding is the way forward, it should be quite "coarse" with 40 grit paper?

 

[BengtH]

Sand or soda blasting?

 

[z_bumbi]

What paint have you used?

 

[fribygg]

Is it possible to achieve the "sawed" surface with an electric planer?

No, a planer leaves a planed surface.