Need some undercoating advice, To undercoat or not to undercoat. Options

[FourBlades]

What have people used for undercoating their cars? Is undercoating a necessity
or is it optional? The car will be used for occasional street/AX/DE driving.

Should I strip the old undercoating from my wheel wells? It looks pretty stable.

So far I have cleaned the underside and painted with eastwood silver rust
encapsulator.



Thanks for any advice.

John

[charliew]

My experience with POR 15 is you HAVE to use their light blue Tie Coat primer to get anything to stick to either black or silver Por 15. I used it under the wheel wells and in the floorboards of a Jeep truck hunting wagon and the rubber under coat just fell off after about two years.
They say to top coat it while it is still tacky and maybe I waited too long to apply the undercoat.
I recently used the black on the bottom of a dune buggy pan and applied Gator Guard over it while it was tacky so this will be my last attempt if it comes loose.
On the jeep truck I tiecoated the complete front end with the front fenders off and it seems to be holding paint ok.
Undercoating will add weight but makes the car quieter and protects against rock chips but is a mess to take off if you need to remove it.
The area you did looks really nice and clean.
Por 15 rust encapsulator turns funny colors in the sun.