There's another place where this type of canvas is used and that's for home built airplanes. They often use exterior grade acrylic base coat for the first several coats.
For our purposes what I would recommend would be exterior house paint in white or near white. Put a coat on, let it dry sand, repeat. The canvas and base coat will give a good tooth for painting the rest of your device on. It's not a super quick process, but it looks really really good.
Madyn wrote:I haven't painted a shield yet but I have a hypothetical question: suppose the device you're going to paint has a red and gold field, and you have some red canvas lying around; using Elmer's (either carpenter glue or the old school white) can you glue it to a wooden shield without "splotches" or smears showing through? Or will you just end up having to paint all of the canvas after the gluing anyway?
I found some colored canvas last weekend but I'd like to know if it's doable in terms of a clean, finished appearance or if I should just pick a netural colored canvas and paint the entire device after gluing. If I can cut down on paint (and upkeep later) by having to paint only part of the canvas that would be great.
Any tips or ideas are appreciated. Thanks.

