Deepest condolences for your loss (apologies for only just seeing your news).
Turning to happier matters, I've also started using Vallejo paints. Didn't get on with them to start with but after making a wet palette things much improved.
My wet palette is a Chinese takeaway plastic container (with lid), a 10mm (ish) thick foam sponge in the base, and a layer of greaseproof paper on top. Put some water in the base of the container, it will dampen the greaseproof paper. Put blobs of paint on the greaseproof paper and mix to suit.
The damp paper keeps the paint workable for hours. Putting the lid on has, for me, kept it workable for 6 weeks. HTH.