When he spills food, I just quietly point where it is and either help him clean it up or do it if he cannot. A bib in public would be good but that may be more attention getting than Ron without. But, a bib at home is great because he's home alone during the day and having something to "save" his shirts is good.
Kathy and I emailed back and forth a couple of times with ideas and such and then she let me know that she had the bib all done. I am thrilled with it, Ron is thrilled with it, and it has already saved one shirt from disaster.