billdunn wrote:

I recently replaced exhaust on my ez---0-320.

In general is there anything to ceramic coating of exhausts or is it a waste of time ?

bd

Sounds good to me in theory. Especially on the inside. The big
question is; does it stick in practice?

Paul Lamar

Doug Mueller wrote:

Hi all, please allow me the moment to chime in here. The ceramic coatings you are refering
to are fabulous. The only problem I have found so far with the use is that it is imparitive
to prep the material thoroughly before applying the material. I have experience with these
coatings. The coating can and should be applied inside and out. The idea behind using the
coatings is to keep the heat out of the metal and flow down the pipe. I have seen numerous
attempts and people trying to apply the coatings and they come back blistering and peeling
after several months of use. If you choose this expensive route please assertain from the
coating company if they use the following process:

1. Bake the parts in an oven at a minimum of 400degrees F for at least 40 minutes before
they apply any coating to your parts! This cooks out all of the oils in the material.

2. Sand Blast parts inside and out only with 120 grit sand or aluminum oxide at 80 to
120psi(pounds/square inch). Bead Blast closes the pores of the metal and retains the
impurities in the metal which is the primary reason for blister or peeling.

3. Bake again at 400degrees for approximately 30 minutes.

4. Do not handle with bare skin. Oils from your hands get on the parts!

5. Follow normal instructions on paint application from coating labels.

6. Make sure that the parts are Baked at a minimum of 350 degrees for curing or if you are
ready to install and use them right a way then you can omit this step and cure them while
you fire them up on your vehicle.
The most important step of all of these is step1-3.

I  also would like to add, that coating companies are really easy to start. There are only 2
coating material suppliers in the country. They are the ones that train the companies
through paper documents how to apply this stuff. My entire 13B Turbo is using the most
exotic coatings available. It is in the testing stage right now. I will keep you informed.
Doug Mueller
RV-6 13BT
N900DM
Henderson,Nevada

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