Sometimes the differences between lexan and plexiglass don't seem all that clear to us when confronted with the choice for building doors, windshields and inspection plates for our aircraft. The key is to understand the properties of acrylic plastics and polycarbonate plastics.
The differences in strength and resistance to chemicals (gasoline!) that may contact the surface are quite amazing. These qualities and others mean that these two plastics should not be interchanged without careful consideration. Both are frequently used on the same aircraft as the application warrants.
Watch this short video to review the key differences between these materials and feel confident when choosing the right product for the job.