Toymungus wrote:I used Pentel Arts oil pastels. I did not use water to blend the different tones (and more or less used my fingers to spread to silicon and smudge it. I was not gentle, but I could see water helping as long as you did not use too much. That might get muddy and messy... but I wouldn't mind experimenting to see.
Thanks for the advice. Don't experiment unless you have a messed-up body for that already (I do). Besides, mine (the ones I was talking about, I have normal oil pastels too) are supposedly designed for working with water, so that might be a different story altogether. I've already misplaced them, but will report on my findings.
Update 1: found them... they are Portfolio Water-Soluble Pastels, 24-pack.
https://www.amazon.com/Crayola-52-3624-Portfolio-Soluble-Pastels/dp/B00006IFAG
Update 2: as expected, the water-soluble oil pastels are not a good idea -- unless perhaps you want something very impermanent. My little experiment wasn't in ideal conditions, as the body for the experiment was already painted over with non-water-soluble oil pastels to begin with. Anyway, something washed off (I presume mostly or only the water-soluble part), the rest remained pretty much as stained as before (but perhaps a little bit less). When I dried it, it still didn't bleed color, but it was tacky, so I had to apply protective powder.