I have recently got a firehose linen strop, and it looks like it loved the shape it got in transit, because it doesn't want to flatten. I followed some of the tricks in this thread, to no avail.
Here is the original state
Attachment 269620
So I made it wet with a water spray bottle and I ironed it with steam, and it got a little bit better.
Then, I made it wetter, and I attached a 3 lbs weight to it (and put a plastic bag around the leather to protect it)
Attachment 269621
While It was under weight, I also put lateral pressure on it, which created some kind of cylinder. This was in the hope of disrupting these waves in the fabric.
Then, I rubbed it on the back of a chair (about 100 passes)
The final result:
Attachment 269622
What should I do next to get this strop to the next level?
It is held by Chicago screws... I could detach it, but is there a risk that it would shrink or expand in a problematic way?