John Leeke, Preservation Consultant wrote:

> Please tell us more about Tnemec paint. I'll be supervising the 
> painting of some exteior cast iron blauster this season.

I have used several Tnemec paints over the years. I was most impressed 
with Tnemezinc used as a primer to freshly blasted cast iron. These are 
industrial grade paints... used on water towers and in harsh 
environments. There are several categories of blast cleaning... pay 
attention to them. It is not worthwhile to use Cadillac paint on a VW 
prep job. ALso, if you are blasting to clean metal pay attention to the 
lead content of the existing primer. Tnemec paints are more expensive 
than most available paints and not exactly what one would spec for the 
run-of-the-mill cast iron facade. For the lower end I go w/ a 
Sherwin-Williams (or equal) alkyd -- this for those clients who do not 
want museum quality and wherein the driving motivation is to be 
affordable enough in the coating that the work actually gets done and 
the facade preserved. I say this having done the dastardly deed of 
painting at least a dozen cast iron facades. Tnemezinc is by all 
reasonable expectations not reversible... but then again it will outlast 
any of us. I also recommend that you had better make sure the painters 
are experienced with application of epoxy coatings.

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