One way or another all canvas has to be varnished.
With my Breathing Color acrylic stuff I use 2/3 matte and 1/3 gloss mixed. Then dilute that with 50% distilled water.
I use an hplv spray gun and give three light coats in a row. Yes, you can also use one of the rounded end foam paint brushes to apply it. That uses more varnish but does work.
The BC company has a video showing the application on their website. The cheapest hplv spray gun I've found is the Wagner that costs about $70.00 at Home Depot.
If you are going to do a lot of this kind of work it pays to buy a better unit like any of the Fuji Mini Mite units that start at about $700.00 I believe.
http://www.fujispray.com/hvlp_systems.htmBut rolling it on works well if you take your time. You simply pour a lot of the varnish on the canvas and follow their directions then walking away and not over working it. It is self leveling if it is still wet.
In a pinch here is the option of spraying the canvas with one of the aerisol cans like Premier Art, etc. That will protect it, but nowhere near as good as the canvas varnish and it ends up being a lot more expensive and toxic.
john
Thanks.
I havent used a varnish before.
I see they have a gloss and matte varnish. I guess I should get both, and 2 rollers to apply it?
Is it easy to apply? What are the benefits?
Thanks