If you have Gingher duckbill scissors, you can send them to them for sharpening. They do not sharpen other brands, however.
https://gingher.com/
It is not worth the trouble. between shipping and labor is more than a new pair of scissors
I have a Hubby that can do this for me. He keeps the knives and my scissors sharp
I was told by the last sharpening person that he could not do embroidery (curved) scissors but have not asked about duckbills. I think sharpening is a dying art. Hugs. Nan
I take all my important scissors to (my fabric store) Spotlight they have a fellow that comes in once a month to sharpen any that are left for him.
I have ordered a thingy from Echidna here in Australia for sharpening your scissors. I don't know about the duck bill ones though. I will practice on some old scissors first. Order should arrive in the next few days. Hugs
My dealer (Pre-Covid) had a fellow come out and we customers, made an appointment to bring in our scissors to have sharpened. I don't know what I'll do for awhile now. I do have a "whit" stone, so I may have a go at it myself?
Hope you get a better answer than mine, Mary - but, I usually cut into aluminum fold over and over. It helps - not sure if it is the best way thought! Stay safe! Laura
I wonder if this would help pinking shears. At this point, nothing could hurt......