Mobile Tint Guys Dan Stragapede and Walter Melkowitz are film enthusiasts of the home improvement variety.

They’ve had a friendship and partnership installing window tint together for more than 30 years, but they formalized their new business venture, Stone and Glass Protection LLC, in January. They separate the two parts of the business into Mobile Tint Guy and Stonetop Protection, both specializing in the application of a protective film to glass or natural stone, to achieve different outcomes and effects.

For some clients, it’s privacy. For others, it’s to save on energy bills.