It's been quite a while since I read this so everything is very hazy.
This comic must have been from late eighties/early nineties.
There were ninjas involved and they had masks that appeared to slide on and off their faces like liquid.
I believe some (all?) also had fedoras (or similar type of hat) for their outfit.
Finally, I think they were in Hell, riding a double-decker bus and fighting the baddies.
Please tell me I haven't made all this up :)