Reddit mentions of Privateer Press FP3: Wet Palette Refill Pads

Skim milk is the consistency I go for. Personally though, instead of adding water I would highly recommend a wet palette. If you want to take your painting up a notch, then the wet palette is what you want. They are easy to make. Just get a container, throw a sponge in there, add water so the sponge is wet and there is a thin layer of water at the bottom, and finally top it with a piece of painting paper. I use the P3 wet palette paper: https://www.amazon.com/P3-Palette-Refill-Pads-93109/dp/B001F8RZIQ/ref=sr_1_1?ie=UTF8&qid=1537873511&sr=8-1

I made my own but there are some out there you can purchase. However you go I would highly recommend one. It takes a bit getting used to painting off of, but it's a game changer!

Although there's all kinds of branded equipment (from pin vises to knives to files) specifically for minis, you usually don't need to get the "official" stuff. Cheap pin vises (for drilling and pinning) can be found at any hobby shop, and my $5 set of files works splendidly.

That said, I did get the official wet pallette simply because it was much smaller than any non-branded ones and takes up less bench space. And, admittedly, I'm ok with paying for the convenience of pre-measured pallette sheets. If you wanted to try out painting with a wet palette (and you should!), you can make your own pretty easily.

You might also consider putting something over the table/desk/whatever you work on. So you don't get paint on it or accidentally cut into it with exacto knives. I just use a desk pad that I found at staples. That way I can also write notes to myself on it.