What's a good barrier fornon archival panels?

[huguito]

I have few panels that i would like to mount canvases to and have no idea if they are or not made of materials that may compromise a print after a while.
Is there anything like a paint or a lacquer I could use to cover those panels and protect the print in the long run?

[shadowblade]

It's hard to suggest if you don't know what the panels are made from!

Coating it with Breathing Colour's Glamour II or Timeless could work.

[huguito]

The panels I am talking about are Plywood panels.
I could be very very wrong, what I was thinking, is that a couple of coats of oil based paint would stop most contaminants to reach the canvas mounted on the panel.
Hugo

[John Nollendorfs]

Acrylic Gesso would be a better option!

[bill t.]

I have some souvenirs from an old exhibit, paper prints mounted to Masonite with Elmer's White Glue, which Miracle Muck's little sister.  Still lookin' good after 40 years.  Masonite is a textbook of non-archival materials: formaldehyde and lots of stuff I can't even spell.  No matter, that barrier of dried glue has saved the day.  The only thing wrong with those pieces is physical abuse from too many changes of venue.  A few of those were actually attached with wallpaper glue, and they're OK too. 

Where there is no molecular motility, chemistry grinds a near halt.  Lock those molecules down and they can't misbehave.  Which is why I would stay far away from the oil based stuff.