1.   Bat guano may be on the ceiling, but it may be solid enough not to stain the ceiling.

2.   The ceiling still is stained with remnants of beverages thrown into the air.

3.   Will any of that varnish go through the cracks to stain my ceiling?

4.   Their blood dripped through the floor to stain the ceiling of the room below.

5.   Their blood dripped through the floor, staining the ceiling of the room below.

6.   When construction workers first stepped inside the Afghanistan Embassy, dead termites carpeted the floors and decades-old water leaks stained the ceilings.

7.   When construction workers first stepped inside the Afghanistan Embassy, dead termites carpeted the floors, walls threatened to collapse and decades-old water leaks stained the ceilings.