I know from experience that vinyl will ruin varnish or anything pertaining to wood and a finish. You are right about the air flow. Vinyl doesn't breath at all and reacts badly to wood. Maybe the curtain stuff[black-out] plastic might work if they would take it off once a week and check it for trouble and then a really pretty fabric on top. [Probably not tho'].
Last edited by barny; 07-15-2013 at 06:23 PM.