Best paint/sound/heat control combo for underside of car?

77TexVette · 10-11-2009, 09:34 PM

Hi everybody,
I finally completed 90+% of the body work including new fiberglass and epoxy for all factory seams, fender flares, permanently attaching new front and rear bumpers, etc, etc. I'll post pictures in the other thread related to this.

Now it's time to think about the perfect combination of paint, sound and/or heat control for the underside of the car, wheel wells and engine room.

Here's where I am right now:
- All fiberglass/epoxy work is done
- All former paint and undercoating is gone

What I need to know:
- What is the perfect combination of a tough paint for these areas and how good are some of these sound and heat control paints that are around?
- For example, is the perfect combination to paint the whole underside with something like SPI epoxy primer and then add something like Lizardskin http://www.lizardskin.com/on top of that? They have both heat control and sound control "paint". I ultimately want to tend up with a coating that gives me maximum protection from road debris and dampens as much sound and heat as possible.

I have read through many of the post that detail out steps to achieve a great paint job for the top of the car, but not too much specifically for the underside.

Any help is appreciated.

Thanks! Michael

porchdog · 10-12-2009, 08:47 AM

i use lizardskin on every build. on the 57 i just finished we used it inside and the entire bottom. it gives the car a solid sound and helps with stars also. beware of the homebrews for lizardskin. it is not latex paint . it is a latex base. i wont build a car without it. i also use spi epoxy first.

77TexVette · 10-12-2009, 02:48 PM

Porchdog,
thanks as always for the quick reply. I assume you use the Lizardskin Ceramic product or do you use the Lizardskin SC - Sound Control (or both)?
Seems like the Ceramic is mainly for heat and the SC for sound dampening.

Two more questions:
- Did you use the spray gun that Lizardskin sells or does any gun with a large enough cap work? Seems like the Lizardskin gun can be stuck right into the bucket.
- I am still planning to cover the interior with Dynamat or something similar - unless somebody convinces me that this is overkill after applying Lizardskin.

Thanks!
Michael

porchdog · 10-12-2009, 03:01 PM

i use the gun because it is adjustable. i also thin it a little. i put both sc and hc on them. i use nothing else. i do the bottom and inside of firewall. on inside i do the sc about 60 thousandth thick.on a car like the 57 i use 2 gal of hc and about 1 gal of sc . i now do all of the interior .

77TexVette · 10-12-2009, 10:19 PM

Excellent. Thanks.
Best way to get the product seems to be Summit Racing as they charge only $11.95 in shipping no matter what.

I also found out that the closest SPI jobber is 3h away, but the SPI rep responded immediately to my email and stated they'll ship it directly to me free of shipping charges. Good guys !

Can't wait to get some paint on the car as I feel like I've been sanding concrete (or epoxy resin - same thing) for months.

M.

porchdog · 10-14-2009, 09:25 AM

you can not beat spi for quality or service. if you have a problem you can talk to the man who made it, not some moron tech reading from a tech sheet.

claysmoker · 10-14-2009, 12:05 PM

Hey Porch, how much do you thin the Lizard Skin?

Thanks!

porchdog · 10-14-2009, 12:44 PM

in each cup i use about smidgen but then on a hot day i'll use jest a little

i add water to each cup 1/2 ounce at a time. then go by look or test shoot it . depends on temp and such as to how much you can or have to thin it. but go 1/2 ounce at a time on the first cup then you know for the rest. with the adjustable gun you can get a pretty good surface instead of lumpy oatmeal .

claysmoker · 10-14-2009, 01:52 PM

Quote:

Originally Posted by porchdog

in each cup i use about smidgen but then on a hot day i'll use jest a little

i add water to each cup 1/2 ounce at a time. then go by look or test shoot it . depends on temp and such as to how much you can or have to thin it. but go 1/2 ounce at a time on the first cup then you know for the rest. with the adjustable gun you can get a pretty good surface instead of lumpy oatmeal .

I take it you are using the gun that Lizardskin sells?

Thanks again for all the info. How the heck do you find time to work?

porchdog · 10-14-2009, 02:02 PM

my lap top is in my build room out in the shop .