Or else deliberately trying to bend your bucket?
Deliberately straightening the bucket.
Although that is not my pic, it is the method I have used to straighten a "smile" in the bucket on 3 different tractors. (including mine) The only difference is that when I did those, I used a steel I-beam, not wood.
I neglected to take pics, but found this pic on the web.
The bucket
LIP was bent down, so that is why the jacks are at the lip, not the rear of the bucket.
The bend must be pushed past straight, to allow for spring back.
Using this method, the tractor is off, all the work done with the jack, (or jacks) so no curl involved.