First off, welcome to the forum!
That should be able to be touched up. Rosso Alfa is good like that (single stage). I personally like the touch ups that have the brush. Gives more flexibility. The pens are somewhat restrictive. You can always use a smaller brush or a tooth pick, etc.
You’re in Boston, btw? You need to come out to a C&C or something some time. We have a good (small but growing) group of 4C owners in the area. Kudos for driving the car in winter. I don’t drive mine during winter but you can find mine parked on the streets of Boston/Cambridge most of the spring/summer/fall.
EDIT: I’ve used this site for touch up in the past and it’s been good (I’m sure they’re all pretty similar tbh)
Browse our large inventory of Alfa Romeo 4C touch up paint to keep your vehicle looking brand new. Choose from pens, brushes, aerosol and combo kits to do the job right.
touchupdirect.com