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.