Thanks!
Question: How long do you like to wait for one layer of decals to "cure" before adding the second?
Well, as long as you asked, lets go through all the steps... mainly because this is actually somewhat new to me as this is my first time printing decals.
First, why didn't I just use JT Graphics for printing the decals like I normally do? The answer is the main color of the model... which is Tamiya Insignia White (AS-20). This is a light enough color that I didn't feel like it was important to have a white background printed behind the colors (most importantly, behind the yellow boomerang insignia). The secondary color is Tamiya Luftwaffe Light Blue (AS-5), which is the same color I use for the TOS/Phase II Enterprise and would have needed the ALPS printer to get the yellow color right.
The graphics for this are fontless... that is, most everything on the page is hand drawn in an illustration application (hand tracings of original decal art from the series). Even the super small lettering is modified spline artwork, so all this stuff is pure vector art. I did a test printing on my inkjet here at home to make sure that everything worked on the model, and then save the final artwork as a PDF.
For the final printing, I went to Kinko's and had the file color laser printed onto a clear decal sheet (from Microscale). I fixed the graphics to the page with a number of dusting coats of Testors' Decal Bonder Spray (a number of passes from about two feet away from the sheet).
After letting that sit for about 12 hours to fully cure/dry... I cut the decals out of the sheet.
I used Rustoleum Primer which I sand/buffed until I was happy with the surface, then applied a number of coats of paint... sanding/buffing between coats. When I was happy with the paint, I weathered the model (which includes spots of steal paint to make it look like the paint has warn off) and I lock all of that into place with a number of coats of Krylon Crystal Clear. After a quick buffing of the surface again, it is ready for the decals.
For the most part, I just use water to separate the decals from the backing. I apply water and Micro Set (from Microscale) to the surface where the decal is being placed, and once most of the water is out from under the decal I use a very soft, fine brush to apply some more Micro Set.
After about 30 minutes I apply the first coat of Micro Sol (from Microscale). After an additional 2 to 3 hours I go back and look for bubbles or silvering. I take a very sharp, very fine needle and tap the surface around any imperfections. I then apply Micro Sol again. A few hours later I repeat the process until the decal has essentially disappeared onto the surface.
I then give it 4 to 6 hours to fully dry/cure, then I hit the whole model with a few coats of Krylon Crystal Clear. After giving those coats a few hours to dry/cure, it is ready to be buffed and to start again with more decals.
Once all the decals are applied and locked into place with a few coats of Krylon Crystal Clear, I'll apply a few coats of Krylon Matte.
While all of that is clear stuff... all of it would wreck chrome/silver paint, which is why those elements have to wait until everything else is done.
And yes, the whole process is as tedious as it sounds... but I like the final results, so it is worth the effort.