Pinholes in Claessens?

[Julie Deane]

Thanks for the feedback, Richard, Bonfim and Chris.

What concerns me right now, is that I'm about to order a prepared canvas (panel) from a commercial supplier, for a commissioned oil portrait. If I order Claessens linen already adhered to the panel, how will I know it doesn't have this problem?I won't be able to hold it up to the light.....and I don't want to do my own canvas prep, because I'm still learning how to do it well.