The best wash job I ever had was in a little town in Mexico. In the early '90s, I had driven my Nissan 4X4 down to the town of Batopilas, in the bottom of Mexico's Copper Canyon. The road from Creel to the bottom was 84 miles of twisty, steep dirt that was barely wide enough for two
small vehicles to pass each other. I almost had head-ons a couple times while coming around a blind curve. That leads to a somewhat tight spinchster.
It took most of the day to go 6,000 down in elevation. On my way back up two days later, it started raining and continued until I got to Creel. The truck was a mess.
The area all around the canyon is home to the Tarahumara indians who have lived there for eons. They are noted for their running. In fact, a bunch of them had literally carried a grand piano down into the canyon during the 1800s for the owner of the major gold mine near the village. Ruins of the guy's mansion are still visible, & the piano was housed in the lodge I stayed at.
Anyway, back in Creel, I was filing up with gas when one of the indians, who appeared to be about 20 yrs. old, asked me in Spanish w/ hand motions if I wanted the truck washed. When he told me it would cost me 40 pesos, I wasted no time & asked him where I needed to take it. At the time, I think the exchange was about 13:1, so it was a bit over $3. He had a place set up on a side street. He used two buckets -- one to scrub & one to rinse. I sat in the shade with a cold cerveza and watched him scrub, rinse & thoroughly dry the whole truck & shell. He even had a whisk-like broom to brush out the floor, and he used newspaper for the windows. Although he couldn't do much for the under carriage, I was more than satisfied & gave him 50 pesos. A few days later, I hit a rain storm on the main highway on my way to Puerto Vallarta. It worked wonders on the underside.
From what I understand, the road is now fully paved and only takes a little less than 3 hrs. to the bottom.
This aren't my photos because I don't have any scanned. Thank google.