What for? Blue is a lot darker than any other paint or metal and would lovingly soak up a 100 kW laser beam (which would be infrared, anyway). The best surface we could think of was polished aluminum covered in a cleanly-degrading polymer (CDP). But at an open-fire intensity of 50+ watts/cm2, it wouldn't matter. If as much as a few watts/sq cm got through, the surface quality would be destroyed and the absorption would go up an order of magnitude. It only takes about 1.4 w/cm2 to melt aluminum.
What for? Blue is a lot darker than any other paint or metal and would lovingly soak up a 100 kW laser beam (which would be infrared, anyway). The best surface we could think of was polished aluminum covered in a cleanly-degrading polymer (CDP). But at an open-fire intensity of 50+ watts/cm2, it wouldn't matter. If as much as a few watts/sq cm got through, the surface quality would be destroyed and the absorption would go up an order of magnitude. It only takes about 1.4 w/cm2 to melt aluminum.
This blue paint myth is complete hokum.