To the authors' knowledge, no attempt has ever been made to develop latent fingerprints from the glass surfaces of unignited incendiary bottles. It has always been assumed that the accelerants used in the bottles would wash away latent prints. This precept was challenged at the Division of Identification and Forensic Science of the Israel National Police, and, using the Small Particle Reagent method, latent fingerprints were recovered from glass surfaces washed by accelerant fluids with a 65-percent success rate. In the second study, Small Particle Reagent (SPR) proved to be the best method for developing latent fingerprints from surfaces that had been washed by accelerant fluids, as often occurs with incendiary bottles. Considering the particular chemical peculiarities of the samples in question, different compositions of SPR suspensions were tested to optimize the method. A suspension of 0.4-0.6 ml Tergitol detergent and 10 g molybdenum disulfide particles in 50 ml water gave the best results with fresh and 10-day-old fingerprints. In the third study, a method was devised for delicately cleaning the soot layer off the surface of the burnt glass exhibit by ultra-high frequency sonication, thus exposing the underlying latent fingerprint for development. 7 tables