I have yet to switch to Marks paint , but I wanted to post a note about other paint brands.
When first made am certain is ok some what. the problem lays with not knowing just how old it is.
This is because it has no date on it. any paint for that matter. 20 or30 percent off that you are about to buy old paint. you might say no problem, ill just add more oil. Ha You just changed the mix.
Just something to keep in mind.