If the door is similar to my Vitesse door I removed each bolt , photographed in place , put in a plastic bag with a ref no then photographed again with the plastic bag in the photo . You will need to disconnect the winder before the window can be removed . For the Vitesse the 1/4 light needs removal before the window can be removed . Also all the trim / clips .
when reassembling the window can be dropped to its lowest point and the 1/4 light refixed for spraying
Paul