ohh merye jano Nasir bhai, no pressure while drying car, its not ur pressure which dry car infact its ur water magnet or microfiber cloth which will absorb water. By more hand pressure u inducing new swirls in paint.
Visit me next week sunday first half i.e 2 nov than will show u how water magnet do magic for drying car, on that day also going to test new shipment products as well so that would be a small casual gathering, everyone invited to see new stuff, test them Yourself and car care tips, tricks etc 
About cow soap its good for tyer wash and microfiber and applicator pads washing , yes u can rub to wash out tough spots however i doubt about good outcomes on hairs 