Painting a glacier?

The painting team approaching the peak of Chalon Sombero, Peru
From here

Lipaca, Peru, is a village high (5000 meters) in the mountains of Peru being devastated by the demise of nearby glaciers. The people, and their alpacas, have relied on water from glaciers that have now disappeared.  In an experiment, Eduardo Gold, and the foundation "Peru Glaciers" are whitewashing the rocks with a mixture of water, sand and lime to try to change the local albedo and restore the glaciers. The principal is simple: the natural local rocks are black. They absorb sunlight and heat up, a property described by the "albedo." The higher the albedo, the more sunlight absorbed. Gold postulates that by painting the rocks white, the albedo can be reduced. Less sunlight is absorbed, the rocks are cooler, and the glaciers may return.  Using a hand-held measure of albedo, he shows a difference of temperature of the rocks of 30 F between black and white rocks. Then, as seeming proof of this concept, grabs a handful of ice out of the cracks between the rocks, and it does appear that water is flowing where, according to the local people, it hasn't flowed for awhile.

The rocks are painted by an amazing effort of throwing whitewash on rocks one bucket at a time--a hardy people carrying one bucket at a time over rock by rock on this mountainous terrain!  So far, 15,000 square meters have been covered with whitewash. Sounds impressive? It is, when viewed by rock by rock, but it's only three times the area of a football field.  Gold estimates that it will take three BILLION square meters, or 500,000 football fields, to restore a glacier here. the cost would be 1.5 billion over 5 years, a huge sum for a small village in Peru. The UN has given him a startup grant to pursue the project.

But, carrying this further--I never doubt the ingenuity of the human brain. Given proposals to load the atmosphere with sulfur dioxide to create a yellow haze to reflect sunlight, isn't it logical to think that someone will propose that if six billion people were throw just a few buckets each of whitewash on our fields, farms, and mountains we could cool the globe??  .....definitely need to think about this...