Your brothers had crappy American vehicles that get very dirty because they were engineered by genius' and built by nascar/budweiser/wal-mart loving rednecks. So when "cleaned" alot of stuff came out.
Your car on the other hand was conceived by an engineer who was honored to be working for the great Soichiro's company and built by technicians who take great pride in their work, as if every Honda carried their personal signature on it. So even as old as it is very little needed cleaning