This mod has been updated and now works on all vehicles since version 2.0.
To make the glow work, add the "Ashmakers Lava Glow" paint design to your car -> go to the "Color" tab and select the base color for "Color 1", then set a lighter color for colors 2 and 3, to make it glow.

Colors:
Blue
Pink
Red
Green
Violet 
Darkside  

In version 2.7:
- This update removes the old lava (original) and introduces a new version that preserves the glow of the lava, making the machine transparent (for all machines).
- Skins labeled "Clear" will now make your car transparent. This works best if the main color palette is dark.

- The archive has also been cleared of excess for a better organization.
- Fixed other minor bugs