[jogosub]

First, if it's front, have your alignment checked. Then just sand it off with fine sand paper and leave as is... there will be more...LOL

 

[jogosub]

Problem with just sanding it off and leaving it is that the bare aluminum (depends on how deep the scratch is) will start to corrode over time, so touching it up with something would prevent that.

I had quite a few on my 2010 Forester alum alloy wheels - never had any rust on those sanded off areas in 3 years in FL humid climate...

Untreated aluminium has very good corrosion resistance in most environments. This is primarily because aluminium spontaneously forms a thin but effective oxide layer that prevents further oxidation.
Aluminium oxide is impermeable and, unlike the oxide layers on many other metals, it adheres strongly to the parent metal. If damaged mechanically, aluminium’s oxide layer repairs itself immediately.

 

[jogosub]

Upflying - do you have sensors on those whiskers electronically connected to a display on the dash board? ... just kidding....

 

[jogosub]

Mikelipke:

You may have a point there - I flush my inboard Volvo in Bayliner anytime I take it out of salty water...didn't think about that scenario in Detroit!