I'm going to undercoat my Rav4 with heated cosmoline.
Here's an undercoating gun on amazon:
Astro Pneumatic 4538 Economy Air Undercoat Gun - Amazon.com
There does not appear to be any container with the gun.
Has anyone used one of these and can you advise what the undercoating liquid goes in?
Also, instead of cosmoline, I am thinking of using this product, or something similar.
Has anyone used this or have other recommendations for non-grease product?