Strange paint streaks or stains in newly painted room General decorating topics, questions and answers. find help, tips and advice on completing your decorating projects

[Forestman]

We recently painted 2 rooms, and these strange stains have appeared after the paint dried. They look like water/condensation drips, but we have no condensation issues in either room.

Totally baffled as to the cause, and therefore what to do to fix.

Wisdom very much appreciated!

[haringeysashwindows]

What paint did you use and what paint was there before?
Did you do any prep beforehand or just painted on?
was the previous paint glossy finish? Old / new ?

[Forestman]

What paint did you use and what paint was there before?
Did you do any prep beforehand or just painted on?
was the previous paint glossy finish? Old / new ?

We used Dulux Walls & Ceilings.

Prep was to clean with soapy water.

Previous paint is glossy and not sure on how old, done by the owners before us.

[indianshelf321]

As you mentioned the previous paint was glossy, which means that it was probably oil-based paint. Oil-based paint is not compatible with water-based paint, so when you applied the Dulux Walls & Ceilings, which is a water-based paint, the surfactant leached out and caused the stains.