Discolouring on New Paint

[Ian.S]

Hello, this is a bit odd and maybe nothing, but I was wondering if anyone with more experience of painting exterior woodwork might know what's going on.

I made a rough table out of pallet wood and gave it three coats of Cuprinol Garden Shades Daisy White. It looked fine in the dry of the garage but after a week out on the deck and a couple of rainstorms, the water lying on the top has a strange discolouration (see attached photo).

The trellis behind was given the same three coats about a month back and has similar discolouring, which I put down to rusty staples leeching into the paint. There are no rusty nails in the table though.

I'm not sure if this is down to the paint I used, it only seems to be happening on the surfaces that have standing water on them. I'm kinda thinking it might actually be the rainwater that's discoloured.

Anyone seen this before?

 

[martin hill]

Hi There.

It might be oils and sap leeching thru from the wood. But a white tinted colour always going to be a pain in garden with the rain. Try giving it a clean with some bleach kitchen spray.

 

[Ian.S]

I thought it might have been the crap wood I used for the table, but then the trellis is off-the-shelf treated and a different beast altogether. It definitely looks like the paint doesn't like prolonged contact with water, which would be odd for a 'garden' product.