Soupy had a strange reaction with a door - I don't think he admitted to spraying it with anything ( but it looked like he had )
in the last couple of months my guys have had 2 reactions like this, only on coloured upvc door panels - out of the 1000's done it's a small figure, however it doesn't always show when wet but several hours later, which is embarrassing because the customer thinks you've wrecked the door.
It all buffs off ok, just a pain in da behind.
Dark painted doors and frames can go the same way, just depends on how strong your mix is.
Darran