WASHINGTON (AP) — President Donald Trump’s proposal to put a coat of white paint on the exterior of a 19th-century historic landmark building next to the White House is slated for a hearing Thursday by a key federal agency he expects to approve what would be a dramatic makeover.

The National Capital Planning Commission meets at 1 p.m. EDT. Watch live in our video player above.

The proposed painting of the Eisenhower Executive Office Building is one piece of a broader plan the Republican president has said will make Washington more beautiful.

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Trump is making numerous changes inside and outside the White House and its grounds, most notably razing the East Wing to build a 1,000-person ballroom. Across the street from the mansion, Lafayette Park is closed for renovations that include getting the fountains working again.

The National Capital Planning Commission is scheduled to begin considering the plan on Thursday, according to its meeting agenda. Trump calls for painting all or most of the Eisenhower building’s gray granite exterior with white paint. He last year called the gray a “really bad color.”

Josh Fisher, a White House official, in April told the U.S. Commission of Fine Arts — a separate federal agency that also must approve the proposal — that the Trump administration prefers painting the entire building because the exterior is stained and in “great disrepair.”

The White House also presented an alternative proposal to paint most of the building in white while leaving the granite as is on the base.

A proposed image from the White House of what the Eisenhower Executive Office Building could look like if painted white. Image via White House

Fisher said in April that experts consulted by the government could not guarantee that an exterior cleaning would improve the condition of the building.

But the proposal has alarmed preservationists, architects, historians and others who argue that granite is not meant to be painted and that paint would trap moisture, deteriorate the stone and not solve problems the administration wants to fix.

There’s also scant public support for the paint job.

Hundreds of pages of public comment submitted to the National Capital Planning Commission and available on the agency’s website were overwhelmingly against the plan on the grounds that the granite would be harmed by being painted and that problems would remain, at great expense to taxpayers. Others suggested improved landscaping, lighting and other steps to improve the building’s appearance.

Members of the Society of Architectural Historians sent a letter this week to Will Scharf, a top White House aide and chair of the planning commission, outlining why the project “will adversely and permanently alter this important part of American heritage and should be rejected.”

Trump announced in April he had directed the painting of the Reflecting Pool at the Lincoln Memorial.

A report by the planning commission’s staff recommends that commissioners support cleaning the building but said more information is needed to evaluate the proposals to paint the exterior.

Staff also recommends asking the White House to provide information about the type of paint to be used, including where it has been successfully used on exterior granite facades in other projects. It also recommends the White House summarize other ways to achieve the goal, including cleaning the building and/or lighting.

The Eisenhower Executive Office Building is a National Historic Landmark and is listed on the National Register of Historic Places. A lawsuit against the proposed paint job is working its way through federal court.

The Eisenhower building sits across a driveway from the West Wing, and its granite, slate and cast iron exterior makes it one of America’s best examples of the French Second Empire style of architecture. It was the original home for the State, War and Navy departments, and it currently houses ceremonial offices for the vice president and offices for the second lady, the National Security Council and other White House components.

At its April meeting, the fine arts commission directed White House officials to return at a future date to present more information, including the results of paint testing.