In some instances you can get a better job from an MRO overseas.
I repped an A320 C check in Abu Dhabi. There was a very distinct rank or cast system. The management were predominately Europeans, the crew chiefs were Middle Eastern or East Asian, the licensed supervisors were Indian or Malaysian and the unskilled workforce were mainly Philippinos. And the Arabs swanned around the place in their white dresses looking important.
During an undercarriage inspection, the supervisor demanded a tech wash with MEK. The poor Philippinos were in that U/C bay with nothing more than a hankie wrapped around their faces, spraying this stuff with paint spray guns!
It was a lovely clean, shiny U/C bay, and as a result many defects were found and rectified.
Elf & safety would never allow that practice of spraying MEK anywhere in Europe. But it's still the best solvent for cleaning up layers of ancient LPS and all the other crud that gets in there.