Once opened, does it react with the air that gets inside the can, and thus it's just inevitable that it'll "go bad"?
Have a quart of Rustoleum Rusty Metal Primer that I use for, well, painting over rusty metal. Had it for I dunno, at least 6 years. I noticed at beginning of summer it was now making a hard layer at the top of the can and thought it was from a bad seal (no surprise, it's got all the crustiness) so I dropped into a freezer ziplock baggie.
Having to buy a new quart of paint every 5 years is no biggie, and in the future I'll just make sure to clean out the sealing surface more, but I'm just curious, is this normal and expected? Back when I had a house that needed to be painted every few years, the paint can was fully used up when done or needed the following year.
Have a quart of Rustoleum Rusty Metal Primer that I use for, well, painting over rusty metal. Had it for I dunno, at least 6 years. I noticed at beginning of summer it was now making a hard layer at the top of the can and thought it was from a bad seal (no surprise, it's got all the crustiness) so I dropped into a freezer ziplock baggie.
Having to buy a new quart of paint every 5 years is no biggie, and in the future I'll just make sure to clean out the sealing surface more, but I'm just curious, is this normal and expected? Back when I had a house that needed to be painted every few years, the paint can was fully used up when done or needed the following year.