Thermal coatings

[Shannen Durphey]

I've also had experience with Techline coatings.  It is very accurate to say
that "most enthusiasts just don't take the time to coat the inside."  It is a
bit misleading to imply that not taking the time is equivalent to being lazy.  I
agree that it does take considerable time to properly prepare the parts and
apply the coatings, although I have found that hydroflouric acid speeds the
process and pretty well etches any metal in my engines sufficiently enough to
allow coatings to stick.  If I were coating headers, I would use an acid tank
with an hydrochloric acid/water mix to soak the parts in, and a pressure washer
to clean them.  I have done this in the past for paint and the process cleans
the metal extremely well.


Shannen

Jurgen Hartwig wrote:
> 
> > I am just watching this one, but I believe Hooker Super Comp headers
> are
> > coated both inside and out. I've also read on the DIY kits, most
> enthusiasts
> > just don't take the time to coat the inside.
> 
> It's easier to coat the inside of a header when it's new.  When the
> header is used, etching the bare metal and applying the coating is a
> lot harder than just "running a wet rag down the inside."  Just
> plaining stating the enthusiast is too lazy to coat the inside is a
> bit misleading.  I have had experience with Techline's products on
> pistons.  If they aren't absolutely clean and properly prepped, the
> material just won't bite and stick.  Imagine the trouble with a set of
> used headers with primary lengths of 20+ inches.
> 
> regards,
> jay
> 
> PS> I have heard that Techline's stuff is overblown and worthless, but
> that is just hearsay from a friend of an experienced coating company
> owner.  He said something to the effect of "Techline sends all their
> real work to us for coating."
> 
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