Armadillo Scales - Stabilize or no?

I want definitely try it on a slipjoint.
I bet i'll be able to scavenge one of the armadillo vintage bags that occasionally pop up on flea markets here in Italy. Those are souvenirs from over-ocean trips, apparently they loose appeal once back home, ending being sold...here i come the recycler!!

Please correct me if i'm wrong, to straighten do i need to warm it up (around 200°F-300°F) and cool it beetween plates?
 
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