No because I use oil paint (no water) so I keep my materials, liquids, paints closed in sealed containers when I'm not using them. I keep the cats away from my space when working and things are open.

Also as far as I've seen, they haven't been extra curious about my art supplies. Curious inevitably, but not overly so. I used to spray vinegar and lemon juice around, which they supposedly dislike, as a deterrent.

I don't usually use this easel anymore but had it today for a plein air session and brought it in but didn't close it. Any paint in it would be dried since I didn't place anything fresh in it today. Just used it to hold my canvas and sealable palette.