Join Date: May 2011
Location: N Central Illinois
Bikes: 12 colnago clx3.0, 12 Bianchi Oltre VDCM, 13 Bianchi Cavaria,12 Bianchi infinito, couple vintage Bianchi's and a 1980 alan super record
Scratches in aluminum can be removed by varying degrees of fine grit wet/dry sand paper depending on the severity of the scratch. I've used this technique on motorcycle restoration for a few decades when cleaning up covers with large scratches. It is time consuming and tedious, patience a must, but effective. On a bicycle, I'd live with the scratches.