Is it wrong/bad to clad window and door lintels in aluminum?

We had 28 triple tracks replaced and 2 storm doors and on all 30 the installers put aluminum cladding on the lintels. The painter we consulted said that clad on lintel is ok but Home Depot told us that they don't want to clad the lintels on 6 replacement windows that they are installing on the front of our house.

Is it ok to leave the newly clad lintels or is this a bad thing?


We have 1927 Chicago brick bungalow in suburbs of Chicago.