DIY Fabric Waxing Kit or Workshop for Durable Gear.
The user is 'super interested in waxing stuff lately' and has successfully created a waxed bag, expressing enthusiasm about increasing its lifespan and water resistance. They are also keen to share and learn more about mixtures and processes. This points to an opportunity for a well-packaged DIY fabric waxing kit (including wax, application tools, instructions), a workshop (online or in-person) teaching the techniques, or even specialized wax blends for different fabric types and desired finishes.