I'm making a window bench sofa. Need some advice regarding the upholstery. It's my first time so want to get it right. I was thinking to get a thin MDF board then using spray glue attach the foam to the MDF board. Then get my chosen fabric and spray some glue over the foam and then attach the fabric on top pulling over the folds to the underside of the MDF and then stapling it. Is this method correct or do I not need to use glue between fabric and foam? Is there anything else I should put between fabric and foam?