I would have to disagree that gelatine capped Colloidal Silver is not good for external use. My findings differ and there have been others here on the forum in the past that have reiterated the same thing. Gel-capped Colloidal Silver DOES work externally.
Wait for whatever it is to stop bleeding and if you want, put a couple drops of naked on it to kill any bacteria immediately. Once dry, double coat the area with gel-capped (I use 80PPM). This forms a conformal, medicated covering that will not wash off quickly (gelatine has to bloom again) so maybe washing your hands if thats where the cut or abrasion is would be OK as long as you dry them quickly but if you take a shower, recoat.
My experience is that cuts heal FAR faster with the gel capped Colloidal Silver over them than with just using the "naked" stuff.