The best way to use Saphir Medaille d'Or Suede Renovateur is to spray on leather products that are relatively clean. If they are very dirty, wash them first with a mild cleaner and make sure they dry properly. The suede is then brushed with a good suede brush which lifts the fibers.
Spray evenly over the entire bag from about 20 cm distance. Suede Renovateur is highly concentrated, so one layer around the bag is enough. This is done outside. After 10-15 minutes you can go over the suede gently with the suede brush. You now have a very good protection against water and dirt that goes deeper into the material.
How often the bags needs spraying depends on the conditions they are used in and how often they are worn, but around ones a month with normal use is recommended.