Here's the 3 cover sketches I sent into Marvel for the Captain Marvel #5 cover. Drawn at about 2 x 3 inches in my sketchbook then scanned and colored in Photoshop.
Once approved, drew full size at 11 x17 inches on 2 Ply Strathmore Bristol Board with Light Blue and HB Pencils.
Inks by Rachel Dodson using Windsor Newton Series 7 #2 Sable Brush and FW Acrylic Ink. I added the ship details and ground details with a Black Pen.
Colored for solicitation in Photoshop CS3 with a Wacom Intuos Graphics Tablet. Will do some tweaks for final printing.