There is a spray especially made for covering ink jet printed pictures,
if that's what you made the decals with.
In Hamptonburgh, NY
In the original Orange County. Est. 1683
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You don't need a special spray. Any fast-drying clear lacquer or acrylic should
do the job. You just have to dust on the first few coats so it dries almost
instantly; if it stays wet more than a few seconds, the ink will bleed. After
you've built up a few coats, you can start spraying it on a little heavier.
In the artists' Supplies store will be a product called an Acrylic
Extender or an Acrylic Retarder (both are the same product.) Its a
clear mousse like gel that is completely miscible with water based
acrylic paints. You will find lots of other uses for it including
putting on a coating for your home made decals. Applying it over
regular water slide decals will make those decals look like they have
been painted on as it will make the clear carrier film disappear. It
will do the same with the rest of your model's paint job, like making
paints with a different reflectance (some matte some glossy), look
like it has been painted with the same batch of paints.
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