Tuesday, June 26, 2012

Priming: PreKote, Paint Booth, Parts, Seafoam?

The actual priming process, begins with the PreKote surface preparation.  Here is my indentured servant plying his trade.  Ignore the unapproved footwear - the inspector missed this deficiency.



Here is my attempt at a paint booth, complete with table and air hose from the garage-based compressor.


And the parts laid out on the paint table...


Fin, ready to go.


Rudder patiently waiting his turn.  A dowel is used to spread the halves apart.


Another parting shot of the booth with parts table and the fin and rudder just hanging out..


I realized that I had not taken any pictures of the primed parts until today.  When my indentured servant's associate saw them, she matter-of-factly pronounced them seafoam.  I countered with pistachio.  The Deft tech sheets state blue-green.  I'm just glad it won't be visible. Skins are obviously not shown here.



There are a couple of issues worth mentioning with this primer.  It is definitely not well suited for small applications, although the tech rep mentioned that they do sell pints.  I purchased a gallon "repair" kit and the base comes in a gallon can containing 36 ounces.  The catalyst comes in a quart can that contains 18 ounces.  When mixed in correct proportion to the distilled or deionized water (4 parts water to 2 parts base to 1 part catalyst), the yield is 128 ounces or 1 gallon.  What remains to be seen is if the 2 parts that aren't water are still liquid when I use them again (hopefully tomorrow), 4 days after they were initially opened.  I have been warned that the base would skim over and the catalyst might be jello within 20 minutes due to exposure to oxygen.  In anticipation of this, I purchased an ingenious (ingenious if it works) product called Bloxygen.  It is simply a spray can of argon gas.  The theory is that you spray it into your opened perishable can of whatever (paint, stain, catalyst, etc) for 2-4 seconds and then immediately re-seal the container.  The argon gas is 25% heavier than oxygen, soooo, the air should be mostly displaced from the can with the remaining argon gas sealing the contents from the oxidizing effects of the air.  Stay tuned for this one.

Addendum: Added this picture later to illustrate the chemicals/process involved with the priming.  From left: Deft catalyst and base, Harbor Freight HVLP gun ($12 on sale) and Bloxygen.

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