Must wiper inserts also be tempered to be useful as picks? I replaced the ones on my car with a set someone had given me for Christmas and I pulled these out of the old wipers. Excuse the mess. We're still unpacking from our move.

I was able to straighten them by hand. They seem to flex a lot parallel to their flat edge, but almost not at all in the other direction. I guess this is good for picking, but I'm not sure whether the side-to-side flex will be an issue. I'm also not sure whether they will retain their strength in that direction once I have removed most of the material to create a thin tool that will fit in a lock. Here you can see the residue left from scraping the rubber/adhesive off of one side.

The following photo shows the difference in thickness between my HPC picks and the wiper inserts. The metal they are made from is about twice as thick as the HPC picks. I guess it shouldn't be too much of an issue to sand and polish them to be narrower, if need be. I
think they were Bosch wipers, but I'm not too sure. I was too eager to tear them down for the metal inside!

I have a Dremel 4000, which I'd like to use for this project, but I admit to being a newb at metal work. Are these aluminum oxide grinding bits my best bet for removing large amounts of material? Or, should I go straight to tungsten carbide cutting bits? Should I do anything between grinding the general shape and sanding to polish? I mean, is there some intermediary step that I am not accounting for?

I'm off to read everything I can on this. I did try a Google search for "site:lockpicking101.com wiper how to" and a couple other terms, but I didn't find what I'm looking for yet. I thought I'd make a productive post in case anyone feels like chiming in on these questions, but I promise I'm making appropriate efforts to find the info on my own as well.
Thanks so much!
EDIT: One more question. I have an old, broken G4 Powerbook with a titanium case. Has anyone tried to cut picks from the case material of a titanium-cased Apple laptop? I don't know how thick it is, but it seems like it may be perfect for making picks and I have no other use for it.
EDIT 2: I found the following in another thread. Since I was able to bend my wiper inserts flat, does this mean that they aren't suitable for picks?
GWiens2001 wrote:An easy test is to lightly bend the spring with a couple of fingers (put it under light tension to reverse the angle at which it is already bent), then release pressure. If the insert retains the bend, it is not suitable for picks. Decent springs will bend back to their original shape, and make great picks.