Dyno results - Tquad vs Holley vs Qjet - tuning issue, too rich

Another question, after cleaning the carb all up really nice, a few days later, the top plate starts looking like crap, really dull, what can we put on their to keep it looking nice like it does right after cleaning it up? I know bathroom cleaner with hydrochloric acid cleans it up real nice looking, but a few days later, that aluminum gets dull and 'whitish' looking. There has to be something to put on their to preserve the metal from looking so bad so quick.