All it requires to use masking fluid on oil paint is time and patience. Here’s how.
Prep the canvas. The stretched canvases in the stores have a coat of gesso, but they’re a little rough. I sand my canvas, coat it with gesso, sand it again, another coat of gesso and a final sanding. Mix a little water in with the gesso so your paint is smooth as possible. I usually spread this canvas prep part out over a couple days. The smooth surface helps when painting lines.
Tint the canvas with thin oil paint. I used alizarin crimson. Add drops of turp slowly mixing them into the paint till you have thin paint. It doesn’t have to be too too thin, or the color might rub off later, but thinning the paint with turp spreads out the oil and the masking fluid will adhere to it nicely. If you have medium mixed in with the paint that might make the surface more oily and then the masking fluid wouldn’t flow off the brush well. So only use turp.
Give it a week to dry before painting the masking fluid on the tinted canvas. I put some soap on my brush before dipping it in the masking fluid. It helps with keeping the masking fluid flowing off the brush and not gumming it up.
Basically it’s the same as using masking fluid with water base paint, so I don’t know why they say it doesn’t work with oils. You paint right on top of it and peel it off after the paint dries. The hardest part is waiting for your paint to dry so you can take off the masking fluid and reveal your creation! hahahah Sometimes it’s easier to take the masking fluid off. It just peels right up in a long strip. Sometimes it’s a little messier. That’s probably because my paint wasn’t dry enough.
If you don’t have the patience for slow drying oil paint, acrylic might work. I like oil, so, I had to give it a try.
I love Celtic knots. This book shows you how to draw them. You could put the book on a copier and blow it up to the size you need, but I like to follow the patterns and work it out like a puzzle. I drew my pattern with charcoal on brown wrap to the size I wanted. It’s an easy design to copy. Then went over it with magic marker to make my lines thicker before transferring it to my canvas.
I really appreciate this guy, George Bain for figuring out the patterns and publishing them, because I’ve used these designs so many times over the years. And the original Celts, who came up with this type of design were genius!