I drew these guys with a Pilot Custom 823 FA and Platinum Carbon Black ink. The FA nib has a good drawing width on watercolor paper - one of my favorites. It's a soft nib but I don't use the line variation, just some nice shock absorption with each downstroke. The Carbon Black ink is out-of-this-world good, though being pigmented I fear keeping it in too many pens.
Happy Thanksgiving! This is "Sunday Wonderland," colored with Holbein watercolors on 6x8 paper. May your Thanksgiving be as bright & happy as pictured here! (And may you ride a horse-thing, too.)
My favorite way to eliminate the often paralyzing fear of "ruining" "good" paper is to just paint on any and all junk mail that comes into my house. Higher end catalogs are great for this, they don't use slick, thin paper (and even that gets used in collage or as a desk cover for other projects) and they're already bound for you. Just add marks! Carry it with you. Scan the pages you like. Cut it up later for making other art. It's "just" junk mail, so there is literally no pressure. I have HUNDREDS of these type of things and I run across them all the time, forgotten, in some old backpack or purse or drawer and it's a treasure to look through them again, and add new marks, paints and words.
