Consider using the Spark
collaboration tool to connect with others who may be able to help, and read up on the main site for as much information relating to fire safety
as you can. Even though you're not making actual fire art, creating a beam that can generate that kind of heat raises very similar issues regarding injury, safety, and cleanup (that temp would probably leave a burn scar). You may also want to connect with someone at the ARTery for suggestions on ways to pull this off safely. Good luck, the project sounds like it could be fun!