Read that it is possible to improve water resistance of camera bags made of canvas, e.g. Domke, Safrotto, Mekko, etc.
From 3M's website, 3 types of spray are recommended:
Scotchgard™ Fabric Protector
Scotchgard™ Heavy Duty Water Repellent
Scotchgard™ Ultra Water Repellent with Mildew Block
Anyone tried it before? Which is most suitable? Any feedback appreciated.