"Nice bridge ya got there Swelter... except for the bit where the shingle is all funny shiny and... odd..."
"Thanks!" I says... "and did ya notice that the whole model has that funny effect? Did ya? .... uv course you did!~ You was jest bein' polite and mentioning the shingle 'cause its all kinda pink like....."
Well... lets jus get the FAIL out of the way!
What you have here is a clearly labeled can of Plastic Primer. Its transparent and in a matte finish... but its still Primer and not the Sealer top coat that I was looking for!
Still I've had a lot worse Primer fail.... heck... I've had a lot worse Sealer fail for that matter.
So yeah... basically I seized that last best chance to destroy a model and sprayed it down with Primer. 
It dried transparent as the can suggests but there is a bit of shiny-ness to it and some color shifts... most notably on the red/brown shingle on the main house. 
I think its recoverable with a little effort on the shingle and some Dull Coat... once I'm able to get some... but otherwise the thing looks ok..... the rest of it seems mostly to just be a bit shiny.. which the Dull Coat should solve... Famous last words!
On to Carnevale and some very pasty Strigoi getting their subsurface done... mostly in Reaper Vampiric Flesh triads... because... Vampires!... and some Blue... just because I spilled a bunch... its been that kind of day around the studio!
Time to but the brush down and grab a beer!