Redscaling black-and-white film won’t create the dramatic color-shift effect you see with color film, and it won’t invert the image. Instead, it mainly changes how light reaches the emulsion.

Based on users’ experience, the result is typically:

• slightly softer images
• some light loss, so the film may behave a bit slower than its box speed
• a mild warm/orange-brown filtering effect rather than a true red filter
• tonal changes somewhat like using a colored contrast filter: reds/yellows may render lighter, while blues—especially sky—may go darker

There’s also a practical downside: if the film is loaded/emulsioned the wrong way around, the emulsion side is more exposed to camera mechanics, which can increase scratching.

So the short answer is: no inversion, no dramatic “redscale look,” but you may get altered contrast/tonality, lower effective speed, softer rendering, and possibly more scratches.