Grumpy560, you've got more patience then a man ought to pray for!  After all the work you've done, and I don't care how much you think it is going to get scratched up, I would not even think of a rattle can paint job.  No way!!
I couldn't paint the inside of a paper sack that nobody will see!
But when I did my L305 I talked to a good friend who is a retired body man.  He gave me a half hour primer (study class, not paint) on how to do it.  I bought some hardner from local hardware store and mixed a guesstimate of 10% for both colors.  It came out much better then I though I could do, and I'd do it again in a New York second. 
Painting all that work with spray cans would be like putting sand in the oil!!!
Don't do it.
 
You talking about saving the decals 'tell next time.  I had a buddy who thought like that.  He'd buy a new hand saw then put it up on a peg board and continue using his old one.  Same with a drill,  save it for a while and use this old one.  On and on......  They sold all his new stuff in an estate sale!!!!
Live life while you got it.