External Gloss Problems

[anrkyuk]

Greetings,

My mother had the outside of her house painted about 6 years ago, masonrey paint on the walls and weathersheild gloss on the sills and pipework. Recently the gloss started to flake a little so I rubbed down with fine wire wool, touched up and bare sections with external primer. When dry cleaned everything up with spirit. I had to leave before I started to paint and return a few days later.

The paint I bought is weathersheild black gloss.

When the paint is applied after about 15 mins it begins to recide leaving behind spots without paint, acting almost like painting oiled based paint on a wet surface. It did this on sections primed and not primed so is not the primer, and on pipes and the sill so it not due to the surface.

I did however find out after painting that it rained for a few mins the night before I painted, the surface at the time was very much dry. Is it possible that there was some crud in the rain and it left deposits that caused this ?

Would a light rub down with a fine sand block then wipe over with white spirit and then paint right away would fix this ?

I would ask if it was the paint but some large sections are perfect, and yes the brush is a harris gloss brush and brand new out the pack at the time of painting.

I have painted using the same paint on the same materials painted here and never had this problem before.


Piccy ( paint work looks rough I know as I stopped when I realised what was happening )

Thank you in advance for your time and words of wisdom
Regards
A

 

[Pigeon85]

Is that a plastic pipe?
If it is the your probably better off just replacing it with new black ones.

 

[Bosswhite]

Give the pipe a second coat of gloss, That should solve the problem

 

[anrkyuk]

That is a plastic pipe, that particular pipe was installed just before the outside was painted about 6 years ago when an upstairs toilet was installed. Mum asked for black pipes and the guy installed grey. It was painted weathersheild gloss which on the tin says lasts 6 years and it has so not going to complain.

As for replacing a waste pipe thats well beyond anything I would contemplate doing myself and i'm just trying to tidy up the outside of her house as she wants to sell up soon.

This morning on a 2ft section of pipe and on one window sill I lightly rubbed down with a fine sand block and cleaned with a spirit soaked rag then painted and is about 95% better. So will do this all over giving 2 clean coats as described above. Something must have been in the rain that caused it and I should have cleaned it a second time before painting, my own fault.

Thanks for your time
A

 

[Pigeon85]

I recommended replacing purely as a cosmetic point of view as in all honesty it would look a lot better than painting it. As rightly said another coat will cover it, just give a light sand then wipe away with a cloth dampened in white spirit.

 

[geraldthehamster]

I recommended replacing purely as a cosmetic point of view as in all honesty it would look a lot better than painting it. As rightly said another coat will cover it, just give a light sand then wipe away with a cloth dampened in white spirit.

Another coat will cover it. It will fall off eventually. I've just replaced a load of downpipes and external sink wastes at my father's house, that were in a similar condition- grey pipe that someone had painted black and repainted on a number of occasions as the previous paint had fallen off. I replaced the lot with black.

Cheers
Richard

 

[Chri5]

Down pipe isn't dear, 4m sections are less than a £10.

The same down pipe to paint 2 coats and prep might be £30 of labour and materials.

Sometimes new / replacement is cheaper.

 

[spud1962]

This seems to have happened to me too.
I've used Weathershield many times in the past and have always
been pleased with the results both in terms of consistency and finish.
I could not believe my eyes when, after about five minutes of painting I came across this result. After forking out nearly £40 for u/c and gloss I was so displeased with both the formulation (very runny) and finish, I decided to search the internet for comments and came across your article. Letter to ICI methinks!

 

[opps]

They are fisheyes, let the paint go tacky then double coat or drag the brush just before it goes tacky

the thicker the paint, the less likely the risk of fisheyes