If he "experiments" with his 3 stop ND filter and his 1.5 stop polarizer, his shutter and/or sensor will be damaged. If you are using only an 8 stop filter for your camera, you are at risk (Are you really sure that your filter is only 8 stops?). Check B&H Photo, Adorama, Thousand Oaks Optical, and the NASA website and see the minimum is 16.5 stops (in photographic ND terms, 100,000X). If you are using a DSLR, your eyes are at risk. With a mirrorless, at least only your camera will be at risk. When I was choosing what level light reduction using welders glass, I tried ND 16, ND 17, ND 18, and ND 19 darknesses (16 to 19 stops). Although 16 and 17 were too bright for my viewing taste, they were more than acceptable for a camera. The 19 was too dark for my taste. Based off my own experience, if you are only using an 8 stop filter, you are only taking an unnecessary risk of camera damage and/or permanent eye damage. And for the OP, at only 4.5 stops, it would be a very ignorant decision.

I have good luck in venues where I can scout ahead and learn the actual color temperature of the light sources. It's less and less common to be in a theatre with 3200K Tungsten-Halogen Quartz lights these days, because 4300K to 4700K LED fixtures have replaced most of them, especially in newer areas. HMI lights are usually 5000 to 5600K.

The trick for working with colored accent lighting on location is to set the camera for a fixed color temperature they use for WHITE light, and let the color fall where it may. There is no point in color correcting colored light back to "white." I'm thinking of theatre, rock concerts, and shows where color is used for mood... Runway modeling may or may not be a fit, depending upon what is important to capture.