Hello all. I'm in the process of recovering my sun visors with the basic aftermarket stock headliner material that's on the market (1/4 inch foam backing headliner). I've watched a few videos and I'm here to question the use of adhesive. Is there a real reason too... I observed people spraying the adhesive around thepperimeter of the plastic visor and a bit where the material tucks in-kind of the same place around the edge. I think I seen one guy spray a little on the flats too. He did kind of seem to say not too much.. To be honest here, I feel like the adhesive is a risk of having a lumpy finish look because if the visor is handled during the process of covering, different pressures, thicknesses of glue sprayed on the surface (don't forget how lumpy it comes out the nozzle of a 3m can), dry times of the different thicknesses of splattered glue pentatrating the foams cells, being a regular DIY person who has never covered visors before chances of tracking glue onto a visible surface are quite high. Last, and I'm aware that factories use tools that we don't have, but there is no glue on my visors plastic. And there are little teeth around the perimeter of these visors (probably seen in attached pictures) that grab the material that was tucked in. They stayed in place. Do all upholstery shops glue this type of sunvisor? What's the real "need for the spray glue besides speed and quickness of recovering. Or holding it in place while getting started or whatever. I wonder what other techniques are available to get these covered without glue. Feedback welcome. Thanks.