I'd just print a slightly oversized image on a piece of canvas, apply a thick, highly wipable glossy coat, spray the heck out of the back of the print with Scotch 77 or some similar awful adhesive gunk, adhere to the door, and trim the edges. Wait 1 day. Come back with a a little bottle of coating and a brush and seal the edges of the canvas. If needed you can probably destructively coax the canvas off with a heat gun and some patience, but you'd need to sand the door and repaint.
I've got a little test canvas in the kitchen that I coated about a year ago with Rust-Oleum "Crystal Clear Enamel" from a spray can I got at Lowes. Mega-glossy, very tough, and still in great shape in spite of living near the coffee machine and microwave. It's intended for topcoating. Mounted on Gator. Has been wiped many times. Might be a better choice than say Glamour II or something since stretchability is pretty much a moot point on a mounted canvas. I like the look, wish I was brave enough to use it extensively because it pops that matte canvas up to amazing brilliance. Careful when you spray, it's really bad for you.
Whatever you do don't make promises about longevity other than to say it might last a couple years, but who knows. Because nobody does.
Have always felt PhotoTex was a little lifeless looking, but it could do the job with a very low hassle factor.