Hey Ads, maybe ask if they can cut a thicker veneer (or ask their veneer supplier) would be better than gluing 2 thin veneers together, plus would be more time consuming for the factory you would have to glue one veneer at a time and make sure the centre line is lined up. If they are about 0.6mm thick now I think a 1-1.2mm thick veneer would be ideal and save alot of sand throughs and glue seepage