I tested these paints out before release. I realized the entire & 100% objective for the manufacturers was to produce a durable/lightfast/permanent acrylic paint in aerosol form - about 80% of the pigments used are based on centuries old sources, i.e. pigments for pro range oil paints. It's intended to mix with tube based acrylic paint (not Montana etc)
They are aimed mainly at the the more fine art community or people that are interested in producing something that will last...a long time. Montana for example guarantee ten years, wtf!?
I have no affinity with the manufacturers in question at all and doubt I would paint with these cans outside. However, I do like the idea of my canvas work, that people pay for with their hard earned cash, to be covered by something that is durable.
You defo get what you pay for when it comes to art materials...