Re: (ET) painting, using Extend

["David Roden" <etpost drmm net>]

On 7 Jun 2006 at 8:00, tbamc wrote:

> FWIW, I used Extend (brush on) on a few places on a car, many years 
> ago.  After all the time and effort I spent trying to get rid of that 
> rust, I was really PO'd to find it was back--under the paint--just a few 
> years
> later.

I don't recall what brand it was, but I tried some kind of "rust 
converter," 
advertised to change rust to a paintable surface, and the same thing 
happened to me.  

In some cases on cars, the rust is from the reverse side of the panel, and 
nothing you can do short of replacing the rusting section will really stop 
it.  But in this case I had access to both sides of the metal.  I treated 
both sides with the stuff, and primed and painted according to directions. 
 
About 2 years later, it's rusted again.  

My experience is that unless you remove every speck of rust before 
priming, 
the rust will eventually return under the paint.  This means getting down 
into all those darn pits that the rust makes.  I really don't think the 
"rust converters" are as effective as mechanical rust removal followed by 
the application of an etchant, or sandblasting.


David Roden - Akron, Ohio, USA

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