What is the best way to fuel proof Latex?  Military flat ---

    

Two part auto motive clear.    Of course have you tried a scrap peice with clear dope?

Turns out clear dope eats Latex.

Any particular type of Automotive clear?  Do I get it at a local paint shop?

 

I've got a pdf of a Model Airplane News article on painting with latex by Roy Vaillancourt, in which he says: "If, however, you are using a glow engine, you’ll need to protect the finish with a clear epoxy or polyurethane top coat after it has dried fully."

I'd probably use System 3 urethane clear, which can be had either from System 3 or from Nelson's Hobby.  The stuff is enormously expensive, but it looks like you don't need much of it.  There's also automotive urethanes, which, incidentally, are also enormously expensive.  Sigh.

Note that the System 3 stuff is only fuel proof if you use the cross-linker.  If you air dry it then it's not guaranteed.

I have used oil based poly over latex sucessfully, but I have concerns about adhesion.  Sometimes poly will peel off if everything isn't right. I painted some profile canopies with latex and they disolved, so I don't do that anymore. Has anyone tried the Duplicolor wheel coating?  It is supposed to be really great according to the label.

I just stick with a 100% dope process. If you have to mix any kind of chemicals I would stick with the old school tried and true method and hone your finishing skills. IMO---LOUIE   

You are probbly correct.  The only advantage of Latex house paint is custome mix colors.  Scale needs color matching and dope color selection is getting less and less.

http://stunthanger.com/smf/index.php?topic=20232.0

Although you'll probably still pay less for latex paint and overcoat, you can (apparently -- I haven't tried this) get your custom colors for dope.

You are probbly correct.  The only advantage of Latex house paint is custome mix colors.  Scale needs color matching and dope color selection is getting less and less.

 

"...dope color selection is getting less and less."

  Have you looked at the standard color chart for Randolph butyrate dopes?  The color chart is available for free from Aircraft Spruce & Specialty as well as one of their catalogs (which is nearly two inches thick).  The catalog shows even more colors as the Randolph color chip chart.  The prices for Randolph dope is really reasonable compared to the current model dopes available & Aircraft Spruce ships quickly.