I don't know how you could shine up printed images? I'd love to hear too. when I printed off my hybrid Easter door hanger I noticed the same thing, but then again, I'm so used to paper scrapbooking that maybe that's just it? Add some embellies and I think that'll bring a little shine in.
Kayson 10-9-06 & Cohen 02-08-10
You could dry some clear or maybe sparkly embossing powder. Run a clear versa mark over the picture and then sprinkle a little powder on there and heat it up. It might work.