Lionel:
It's a variation on the mickey mouse scheme as detailed in MTP46.
See
http://milifax2003.tripod.com/home03.html
Steve Guthrie outlined things nicely by putting the guide online some years back.
I noticed over years of searching through photos at the Public Archives that many Canadian vehicles had this soft edge sprayed scheme. Liked it enough to put it on my truck. Not happy with the black paint finish though---it'll need some rework in the spring.
Thanks
Don