The scaffolding on the steeple of Grace Church has been dismantled and the restoration is complete. But the work isn’t all done. As the Reverend J. Donald Waring gently reminded worshippers at Sunday evening’s Eucharist service, “Folks, it ain’t paid for yet!” To speed the process, the church will offer stones from its steeple at an auction Thursday. Proceeds will help pay for the repair of the 100-year-old spire and the interior nave aisle roof.

In late 2002, it was found that water had rusted the pipes supporting the steeple. If something wasn’t done, the parapets would crumble and buttresses would fly. Many stones were mended during the $2 million restoration process, but some were damaged too badly to be of practical use.

The stones that the builders rejected have become a cornerstone of the fundraising campaign.

Those stones include finials, posts, and other carved pieces. Reverand Waring suggests that the stones sold Thursday could be used as decorations for fireplaces or country homes. The auction will also include a series of paintings by local artist Gael Mooney, who has painted the church during all seasons of the year.

Reverand Waring jokes that his goal is to raise $100 million, noting that a similar auction last year garnered $50,000. Judging by those results, each stone is likely to go for between several hundred and several thousand dollars.

The gothic building, which sits at Broadway and 10th Street, has a storied history. It was designed by James Renwick Jr., just 24 when it was built in 1846. Renwick went on gain fame as the architect of St. Patrick’s Cathedral. Grace Church reached its peak notoriety when P.T. Barnum favorite Tom Thumb married Lavinia Warren at a “fairy wedding” there in 1863.

The first spire, which was constructed of wood, was replaced with marble one during the 1890s. Over the next century, the steeple was battered by wind, rain, and the MTA: the N, R, Q, and W trains run underneath the church. Reverand Waring says that the near constant rumbling has contributed to structural damage, since the building “has been subjected not just to elements of nature but to elements of New York City.”

Bidders have the chance to take home a piece of a church that, in the words of Reverand Waring, is “enormously beautiful yet incredibly fragile.”

Thursday, 6:30 p.m. cocktails, 7:45 p.m. auction, 802 Broadway at 10th Street, 212-254-2000, $25 in advance, $35 at the door.