Please answer the following question: Generate a question that has the following answer: A vat with bubbling bath of some sort (acid?) for the following movie plot: Antonio "Tony" Sordi [William Campbell] lives in a studio under an old belltower where he spends his time painting, just as his ancestor Erno Sordi did five hundred years ago. The only difference is that Erno Sordi was convicted of conspiring with the devil and was burned at the stake, whereas Antonio Sordi sells his paintings at prices that the local beatniks can only dream about. What they would never dream is that the Erno Sordi of legend is the same Antonio Sordi of the 20th century [or maybe Antonio is possessed by his ancestor? The movie never explains this little detail.] and that Sordi is a vampire. After feeding on his victims, always young and beautiful women, Sordi takes them back to his studio, places them in various poses from which he paints his popular "dead red nudes," and then tosses their bodies into a bubbling bath of some sort (acid?).Tony's new girlfriend of two weeks, an aspiring dancer named Dorean [Linda Saunders], doesn't know the sordid side of his character, mostly because Tony refuses to let her visit him at his studio. Instead, they meet on the beach where no one knows them and where Dorean can dance in the sand while wearing tights or bikinis. Tony doesn't want Dorean to find out about his pursuits lest the same thing happen as it did in the 15th century. It was his lover Melissa who complained to the ecclesiatical council that he had cast a spell on her and captured her soul on his canvas. Melissa stood laughing at him as his body burned.Max [Karl Schanzer], one of the local beatniks, has been experimenting with new artforms. His latest invention, the quantum gun, has his friends excitedly discussing this "formal" method of painting. But when his model, Daisy Allen [Marissa Mathes], disappears and shows up in one of Sordi's newest paintings, Max asks Daisy's sister Donna [Sandra Knight] to pay Sordi a visit and see if she can find out where Daisy has gone. Sordi denies knowing Daisy, of course, and slams the door in Donna's face. As Donna leaves, an old-timer reminds her about...
A:
What did Sordi use to cover his victims with in his studio?