Thanks for the response. I do see the logic in reason for not needing to "match the paint" as the assembly will cover the hole and painted areas. But, as with many on this forum I do beleive in doing things right so they appear clean. I have made errors I regret, and most have been paint related so I am "in recovery" and on a campaign to promote proper painting technique!
I disagree with the assumption that you can assemble the whole thing and apply paint in 2 hours (or even 4 hours)
IF you want the paint to cure properly, even with a "paint pen".
Even on E-How (do-it yourself for dummies) it instructs you to apply two coats of touch up paint from the "paint pen" and
LET IT DRY AND CURE FOR 30 TO 45 MINUTES for each coat.
http://www.ehow.com/how_5692844_apply-toyota-touch-up-paint.html
Under the directions for the touch up paint, this would take approximately 1 hour of said time. Now, of course during the that time you can be doing other things, such as fitting the hoses, cutting the air intake on the resonator box, etc... but it really leaves the reader thinking this is something they can fit in in the evening after work while consuming 6 bottled beverages.
The problem with installing the snorkel and fitting hardware before the paint actually cures is the contact with the freshly painted surface can cause the paint to be scrapped or otherwise wiped from the surface that it is supposed to protect.
Paint curing is defined as (Yahoo Answers):
Curing and drying are two different processes in modern paints.
When paint dries, the carrier (typically water in latex paints, a solvent in oil based paints) evaporates, allowing the paint to form a film. As the carrier evaporates, other chemicals that act as stabilizers evaporate as well.
The stabilizers prevent the paint curing in the can. Once they start to evaporate, other chemicals in the paint are free to react with each other to form new chemicals. Usually these are small chunks of polymers (think plastic) combining to make larger chunks of polymers that effectively form a large sheet.
The paint will not achieve its full strength until it is completely cured. It will be easier to scratch or stain. Under good conditions, paint will usually be 80 - 90% cured in a couple of days, fully cured in a few weeks.
Also, as the chemical structure of the paint changes, the color and opacity of the paint film will change as well. If you put new paint over old paint of the exact same color, the colors will look different for a while after it is dry, but as the paint cures the colors will come back into line.
I agree I am OCD, I grew up in Hawaii where if you didnt paint something properly it would fail and rust eventually in a few short years turning into a sheet metal tumor.
For those of us that live in Arizona, this is not an issue as the vehicle will not be exposed to a harsh envirnment (aside form heat). I now live in the northwest and I am OCD about paint, becuase if you dont do it right the first time, you will have to correct it later. Why take it apart later if you can take your time and do it right the first time.....maybe I really dont suffer fomr OCD, rather I am just practical with my time???