This is an old Formula 3 race car built by Joseph Potts ltd, Lanarkshire, in 1952. They have it in the National Museum of Scotland, where I drew this a couple of weeks ago as a part of Urban Sketchers meetup (as it’s too cold to go outside yet). This is pretty mixed media: pencil, watercolour pencil, white gouache and some acrylic markers. Drawn on spot.
Scans of my old school gel pen on construction paper early loops works. The green and blue are straight up scans. The others are playing around with mirroring and adding effects in Photoshop to scans of drawn works.