Here is what Sherman Williams, the makers of Krylon Fusion, told me about Fusion, brush on or spray. They warned against using it to coat the vinyl contact "paper" wood grained stuff on the "woodwork" in our vintage coaches' cabinetry. They advocated using a stain hiding primer, latex, and a good quality all purpose enamel over that. This refers to vintage trailers, as apparently the chemical make-up of the contact paper manufactured a few decades ago causes it to shrink and stretch with heat and cold, making the rigid Fusion unsuitable to cover vintage wood grained contact "paper", straight from the horses mouth. Maybe they are being ultra-cautious, but this info might prevent a problem down the road for us.
PO of my '73 Argosy simply slapped a coat of interior latex on the plastic end piece and it has held perfectly for the past 6 years.
I'm with you about down with banana yellow!
1973 Argosy 24
TV - 2011 Tundra
Now at the getting much prettier stage!