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Mike,
Thanks for the quick reply.
I'm not sure I understand the cardboard. Do you cover the entire back or just the stretcher bars? Also, I did use a center support and the stretchers are not warped at all. I have seen artists post something about misting the reverse with water. Is that an option? I have used canvas clips to temporarily frame it as I will recall it in 6 mos. for the final varnish. Is there a possibility that it could tighten up on it's own during this time?
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