Review on 🔫 TCP Global Air Rust Proofing and Undercoating Gun with Gauge - 22" Long Flexible Extension Wand, Multi-Directional Nozzle - Truck Bed Liner Coating, Rubberized Undercoat, Chip Guard Sprayer by Daniel Mandal

I bought this on purpose because it had an extension so I could get to the wheel wells on the back of the truck. If anything, this is the worst place for trucks. I can't get Fluid Film to go through no matter what pressure is set. The material actually exits through a vent at the top of the gun. This is the reverse air supply to the vessel. I'm trying to find a solution to this problem because I need to get into this area. I would be curious to hear if thicker primers work with this filler.