Rusty Frame Painting Help

[capev86]

poly bed liner is FAR superior to por 15. it looks like undercoating and even will act as a sound deadener. mythbusters showed it even absorbs energy from explosions.....try that with your precious por 15. i used proper prep and both black and gray formulas. it was a waste of time and energy. i will never recommend it to anyone. there are many products and practices out there that are much better. i've seen powder coating last for years but i still advocated something more flexible and forgiving for the undercarraige. rubberized undercoating works but moisture gets under it and it will dry and break off after a few years.