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I have found that if you pre-mix then the paint separates in storage and never quite mixes as well the 2nd, 3rd and 4th time.
Share some photos of these kits
My experience with Humbrol acrylic paints is that they thicken with age — a lot. The other week I took the plastic wrapper off a pot of it that I had bought some years ago but never used, and found a solid block in it that had about half the volume the paint had when the pot was filled. In other words: the solvents evaporate even from a fully closed and supposedly sealed pot.I have always used enamel paints, but tried the small pots of Humbrol acrylic that came with a couple of Airfix starter kits
I thought they were a bit thick
My experience is that any acrylic paint that comes in a fully plastic container will dry out faster than ones in a glass jar with a plastic lid, and nothing beats tinned paint like Humbrol or Revell enamels. I have tins of Humbrol from the 1970s that are still perfectly usable (after a lot of stirring), yet Humbrol, Revell, or Games Workshop acrylics dry out within a few years. (One exception seems to be Rackham paints, that are in all-plastic pots but remain usable for ages. However, they have a different problem, namely they cover about as well as tinted varnish does )Perhaps I'll try some other makes of acrylic paint. I was thinking of Vallejo Model Color, but I'm open to other suggestions
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