FAO Painters and Decorators-Why has the white under-coat I used got a brown tinge through it?

Question

It was a brand new tin of paint, brushes were clean, I can't think why this has happened and want to avoid it on the final coat.

OK if is damp will it dry off eventually

OK if is damp will it dry off eventually?

It is woodwork I am painting

Answer 1

Walls are damp

Answer 2

The only thing I can think of is if its oilbase U/C it comes in a metal tin with a metal lid, and somehow some water has got in around the lid and made it a bit rusty.
try pouring some into a paint kettle, or a conatainer, just pour as much as you think your going to need, and give it a good stir, the brown stain should blend away with your stirring.
If not, take it back to where you bought it.

If it had of been an emulsion colour that you had got made up, then you could put it down to the paint was not mixed properely in the shop,that has happened to me a few times, but you just brush it out, or give it a good stir.
But other than what I said above, I cant think what else it could be.
I am a decorator, and I have never known this with any oilbase paint.

Answer 3

Is it an oil based or waterbased undercoat , if its oil based you have to stir it properly,
Are you painting walls or woodwork??
Ignore the damp answer its not that..

Answer 4

did you stir tin contents before applying.the oil always settles on the top,if it get in your brush it will line.

Answer 5

It wont make any difference as it is undercoat,And will be painted over.

Answer 6

if the wood was stained, then you would need a good sealer primer or else the stain will bleed through