For Milenio3, the shiny finish is two or three layers of Krylon triple-thick crystal clear glaze, found in the spray paint section of Walmart. Just don't spay it during damp weather because it will fog. Shouldn't be too much of a problem in San Antonio.
The bases are screen captures from Google Earth of various airport aprons. I print the images out on a 5 x 5 grid of letter size cardstock.
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PaperJerry Modelismo a Escala en Papel