The recipe I use for making homebrew cavity wax is.

half a lb of beeswax (cheap one)
half a gallon of odorless mineral spirits.


grate the wax into a bucket of spirits and let it sit, stir to dissolve completely, make sure its thin enough to apply easily.

thats it.

You can use a garden sprayer to spray it, or just paint it on if you have full access to a panel.

__________________
2012 BMW X5 (Beef + Granite suspension model)

1995 E300D - The original humming machine (consumed by Flood 2017)
2000 E320 - The evolution (consumed by flood 2017)