Hey Tom. Thanks, man.
I put the B-Quiet on both sides of the firewall - and covered the material on the engine side with steel plates that I had fabricated. My reasoning there was that I didn't want the B-Quiet exposed to the elements.
For the inside of the hatch, I used a heat gun and scraper to remove the stock 'goo' material and then treated with a high temp rust paint. I was expecting a little 'drumming' effect, but she's been dead quiet. Replacing the weatherstripping on the hatch require new (longer) bolts, but it has made a hige difference as the seal is now super tight.
POR-15 and chassis coat black are highly recommended. Tough as nails - just make sure you wear a long-sleeve shirt, gloves, mask, etc. Very strong stuff! I will be doing my entire underbody over the winter.
Cheers,
EA
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