Just a note to clarify some comments here. Methyl methacrylate (MMA) is the monomer used to make what we know as Perspex, which is in fact polymethyl methacrylate (PMMA). That is to say that MMA is the base ingredient of PMMA and that it is polymerised to form the PMMA using other chemical components. It will dissolve PMMA or Perspex or other brand acrylics. Make sure you follow the health and safety advice when handling any such monomers. Malcolm