I thought of getting a dedicated prybar for the car and I would probably get one. Actually I found one cute kind called GearWrench Indexable Pry Bar which seems to be the most versatile one. But prybars do not cover all I need.
Sturdy knives are not optimal for prying because they have generally sharp points would deform the base object rather than pry someting out of it. I have to say that I like kiridashi knives a lot, but I dount they are good for prying.
So I kind of lean now to chisel like stuff. Something like this:
View attachment 595976
where red marks the parts with more "acute" grind (chisel grind, 45-60 deg) and green mark the parts of more blunt grind (60-90 deg, not necessarily chisel). The flipper type sharp point is actually kind of a punch. Since the upper edge of the blade is completely unsharpened, a hammer could be used to thrust this sharp punch thru a sheet of metal.
To provide good leverage for prying a chisel should be pretty thick and this is good for general sturdiness of the tool. So I wonder what kind of steel should be used if it is going to be thicker than, say, 1/4 or even 1/3 of an inch and the above mentioned geometry?
I am still thinking of the handle part, I may decide to leave it blunt as is or add some sort of metal scales or a tubular handle so that I can have a kiridashi type spike at the back.