Just tried Krylon UV-Resistant Acrylic Clear Matte on my RG Freedom. I was expecting a lot worse! Some areas where laid on thick but that's from my own bad spraying pattern. :
Krylon® Fusion All-In-One™ Paint + Primer Spray Paint - Matte Sea Green, 6 ct / 12 oz - Metro Market
Krylon K01309 Gallery Series Artist and Clear Coatings Aerosol, 11-Ounce, UV-Resistant Matte Spray Paint, 11 ounce, 11 Oz : Tools & Home Improvement - Amazon.com
Krylon® UV-Resistant Clear Coating Spray | Salty Home
UV-Resistant Clear Coating | Krylon® Spray Paint
Amazon.com: Krylon K01309 Gallery Series Artist and Clear Coatings Aerosol, 11-Ounce, UV-Resistant Matte Spray Paint, 11 ounce, 11 Oz : Tools & Home Improvement
Krylon UV-Resistant Clear Acrylic Coating | BLICK Art Materials