Those pinholes are tiny enough that you might be able to fix it with a quick single thin coating of flat black acrylic paint. Check which curtain the holes are in. Put a short strip of film in the camera, advance it with the lens covered, point it at a bright scene for a minute, cover the lens and press the shutter. Keep the lens covered while you advance the film and press the shutter with the lens covered. Uncover the lens and point it at a bright scene for a minute, cover the lens, advance the film to the end and develop it. If there are spots on the first frame, you need to coat the shutter with the shutter cocked. If there are spots on the third frame, you need to coat the shutter with it not-cocked. Just a very very light coat of flat black acrylic paint and, when it's dry, grind up some pencil lead into graphite powder and brush it onto the paint to ensure it's not sticky. Don't touch it for a few days.
Liquid electric tape is what often gets recommended for such repairs. Avoid that stuff like the plague. It takes years to lose its tack and it's too thick.
But I agree with awty - curtain replacement is the best option. Any fix is far more temporary. You never know when new pinholes will form. So you'll never trust the camera.