When the original tool bag looks OK, it is worth the effort of cleaning and reusing it on your restored cruiser.
To get rid of all the greasy stains I used a power cleaner, sprayed it on and let it soak for half an hour.
Then I used an old nailbrush, and scrubbed off all the dirt. This worked very well.
As a final step, I threwed it in the washing machine and washed it at 60 degrees Celsius.
Finally, it turned out pretty nice and clean!! just a few rusty spots, but that doesn’t bother me at all.
Next step is cleaning the tools, and give them a touch up if needed.
see some before and after pics: