Chalk Hybrid Inks.
I have found that chalk / hybrid inks work best. They are not as prone to environmental damage as dye (water-based) inks are [e.g. they won't bleed or feather in high humidity]. They also give a more consistent coverage than do pigment-based inks, which tend to look "...gloppy..." on the canvas. I like to use 2-4 colors of chalk ink to give the canvas dimension as well as color.
I haven't decoupaged canvas, as much as I have done layouts much like scrapbooking. If you want to protect your finished canvas, you could use watered-down glue to finish your surfacing; however, varnish or beeswax work better. I personally favor the *look* of sealing with beeswax, but it is a bit tricky to work with the first few times and it is more prone to collecting dust than varnish. Varnish will protect your work better than decoupage, unless you're working with a designated decoupage medium (as opposed to glue mixed with water, which can remain tacky, collect dust and grease, and dulls with age.)
HTH ~ kbc
__________________ Hi...My Name is Kaylyn...I'm An Alphaholic.
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