Use some rubbing compound, meguiars scratch x, or GS27 to smooth out that touch up.
A word of warning: the paint on our cars is thin, so don't overdo it with the rubbing compound.
I was fixing rock chips in my driver's side fender, near the headlihgt. I fixed the chips with touch-up paint, and used some rubbing compound to smooth it out, it worked okay, but apparently, when the dealership buffed my car before, they overdid it a bit. after I was finished, I had a pale halo around my repair area, this was because I had worn down to the primer!!! same thing, but not as extreme, on my Hood
, on another chip.
I Primed and resprayed my 1/4 panel and Hood
around the chips, and wet-sanded to get everything smoothed out, now I have to take my car to the shop next week to get the 1/4 panel and Hood
resprayed and buffed out professionaly so it'll look like new when it's done.
So, as I said, be careful you don't overdo it, just keep checking your work area periodicaly so you don't wear through the paint. don't sand it unless you know what you're doing.
BTW, a paint blob can't be fixed with a clay bar, sorry. Clay bars are good for removing overspray and metal fragments in the paint, but clay bars are non abrasive, so they won't smooth out the touch-up paint. that's what rubbing compound is for. go with a mildly abrasive compound,like 3M liquid rubbing compound or swirl mark remover. turtle wax rubbing compund will work, but it's more abrasive, so be careful and read the instructions.
Meguiars scratch x is great for that, just don't overdo it.