Touch up paint questions

I need to touch up some paint on my engine cowling. It was originally sprayed with Alumigrip 4200 Polyeurethane. Problem is I can only find this in gallons. Anyone one know if Awlgrip is the same? They have similar origins and I am thinking it is just a different branding for the marine environment. If they are different, what are the issues with spraying Jet glo as the touch up? I am really open to any suggestions from those more experienced than I.

Eric

Eric,
Alumagrip, Algrip, are both polyurethanes as is JetGlo. You can spray any of these over your properly prepared existing cowling, as for touch up, the Alumagrip that is on the cowling does not blend well, that is if is difficult to hide a spray repair. For best results, I suggest you paint the entire cowling.
Dick