Odd question but. I have used Micron 350 for some years now without problem. However today, it has gone on very patchy and I have used much more than usual. It seemed to be very thick and gloopy and hard work to put on. I normally anti foul later in the year May/June when it's warmer which seems to me the only difference. Everything else is the same, right down to the roller. Obviously it is well stirred before use. The tin was kept overnight in the house and then in the car till I started painting at 4pm. So Is the temperature making a difference and would warming it help?