A study by Schiler & Associates, a Pasadena-based consulting firm, analyzed and located the most reflective parts of the building, and recommended sandblasting the polished exterior of the Founders Room to match the brushed-steel appearance of the rest of the concert hall.

Complaints that the concert hall raised the heat level in the apartments across the street were not confirmed by Schiler's analysis.

The reflective portions of the building were covered with mesh while the study was underway.

Yesterday, Gehry's Los Angeles firm said that sandblasting, should the Los Angeles County Board of Supervisors approve it, would be an acceptable aesthetic solution to the problem. The work will cost the board, which owns the building, $180,000.

"We'd prefer not to have to do it," acknowledged Terry Bell, the concert hall's project architect and manager, but, he said, "we are absolutely dealing with it."

Disney Hall, the home of the Los Angeles Philharmonic, opened in 2003.