This special aerosol spray is both a rust prevention and rust destroyer formula rolled into one. The conical nozzle reaches directly into the frame and sprays in a wide pattern radial pattern to fully cover the surface while reaching deep into the sub-frame. Phenolic resin encapsulates the rust hiding inside the chassis so it doesn\'t rust its way through and destroy the frame from the inside out. Once this is completed, zinc phosphate seals the frame against additional rust. The entire process is complete within 24 hours so you can confidently continue with the restoration. Take a look at the video by pressing the play button above next to the pictures Old frames on vintage or muscle cars are hard to come by, and once you find one, you need to everything you can to save it. Our frame anti-rust coating spray an affordable way to preserve a chassis so you don\'t need to search out or fabricate a new one. This spray is available in a black or green finish to stop rust during auto frame restoration before it can reveal itself to the world. Note that three cans will be need for a full frame or truck frame. Learn more about how to use Internal Frame Coating by reading below or contacting the Eastwood experts. We’re here to help you Do the Job Right on every automotive project. Internal Frame Coating destroys rust hiding inside the chassis, so it doesn’t rust its way through You spend time and money restoring a chassis...but what about all that rust inside the frame? Use our Internal Frame Coating to make your chassis rust-free throughout! Penetrates under the heaviest surface rust. If not treated, the exposed metal surface will continue to rust and begin to show as paint flaking, pint holes or even worse: structural frame failure. Features: Tough phenolic resin penetrates and encapsulates the rust on the internal surface Zinc phosphate seals it to prevent future corrosion 24\" long tube with conical nozzle reaches in to spray coating in a radial pattern for complete coverage Aerosol covers 10 sqft -  Quart covers 50sqft Colour - Black Fully cures in 24 hours - 24\" long tube with \'conical nozzle\' reaches in to spray coating in a radial pattern for complete coverage. The extension nozzle is reusable, simply attach into a can of Pre-Painting Prep and purge it after each use. Read \" How-To Restore Floorpan: Brace and Protect (P2) \" to see how Dave Smith (American Car Magazine) uses our Eastwood Internal Frame Coating for his project.