[Rodney Nelson]

I am in information overload with all of the choices with undercoating...

Monstaliner looks pretty good, but definitely not a factory look, I like the fact that it is tintable. One thing to note is that it is clear when you get it tinted so there is a better chance of it color matching the rest of the car.

UPOL / Raptor has a creamy color that will affect color matching a bit. UPOL/Raptor seems to be harder, less flexible. hard undercoating seems to be less desirable, you want more flex.

3M Schutz, is ruberized with Nitrile rubber. They do have one that is tintable, beige in color but I can't find any videos of people actually tinting it. this would replicate the factory being rubberized and beige in color...

Realistically, rubberized is the way to go if you want it to be an effective undercoating. Factory undercoating is extremely hard to remove via sandblasting because it bounces off compared other non-ruberized undercoatings.

Thing is that none of these will look factory, and I'm not sure looking factory is what I'm really after. Some of the rubberized coating up in the rear fenders of the 911 is like a half of an inch thick, with crazy texture! There is no way you can duplicate this.

Here is what I'm thinking I want...

I want color in the engine compartment with undercoating properties.
I want undercoating in some or all of the frunk, again with color
I want color in all of the wheel wells, under the bumpers and up a bit on the rockers.
I like the ease of using a tinted product because it saves a step in the process.
I am thinking of clear coating the colored undercoating as well.

After some of the comments I may pass on POR-15 as a rust barrier on the bottom, but realistically there is more positive comments about POR-15 than negative and the stuff is way more durable and made for rust prevention compared to a etch primer. I would never use it under paint. Just under undercoating. I'm just super worried about there being some rust that I didn't get to. It is like another layer of protection this car could definitely use. Using standard etch primer is no extra protection.

I'm pretty sure I will be using POR-15 on the inside. If you have watched Mikes Restorations videos on his 67 911, this is what he did, that guy is amazing and a total perfectionist. I'm most likely going to follow his lead on this one and then dynamat over the top of it.

One of my big questions is what should I do right now. I think I'm just going to leave the underside as is for now and move onto the rear fenders. All surfaces have been fast etched, it will not be rusting anytime soon for now... I hope.

We will revisit the undercoating as soon as I'm done with the rear fenders.

I will send out some more updates hopefully on Sunday night.

Thanks,

Rodney