Yes, thanks for that info.
Last year we went through some testing of different primers in the Laika model shop. We had been using NAPA primer, which was pretty good, but was prone to dry spray (in my experience) and more problematically, can failure (simply not spraying at all, or slow oozing loss of contents). We ran into supply chain issues with it though, which is what prompted the search for an alternative. One of the brands that we tried was Upol.
I personally have always preferred Evercoat primer (in addition to their glazing putties). I haven't needed to acquire any in a while though, so I'm not sure if availability has become a problem or not.