Short story: the custom woven fabric we used to have the kilt made did not get a proper finish, and so the kilt wrinkles very easily. Anything that can be done at this point?

Details: (feel free to ask questions).

The kilt is worn by my son. He is a highland dancer, and in addition to years of caring for his many dance kilts, my husband also wears wool kilts regularly.
Just including this to help explain that I am not a total newbie -- I have 20 years+ of experience dealing with kilts in my house!


In 2019 we ordered a small single width order (<10yards) from Dalgliesh/Scotweb to make a new dancing kilt for my son. Tartan was not one that was available in stock anywhere.
I think we ordered 11oz weight but I'm not 100% sure
Kilt was sewn by experienced and well known kilt maker (don't want to name but I have nothing but good things to say about them)
The kilt maker reached out to let me know that the fabric puckered when being pressed after sewing. They said the cloth was not finished in the same way as it should be
I sent many emails to the mill about the issue, but they insisted there was nothing wrong with the fabric and blamed the kilt maker
I did find on the Dalgliesh site (at the time) a notation that single width woven fabric has a different finish process from double

The kilt itself is gorgeous - the fit was perfect and the swing is lovely.
However, coming out of the closet, the kilt always looks like he's just pulled it out of a bag of dirty laundry.
I would carefully press the front apron before championship competitions, but it never stayed looking good.
In all the years of dealing with our family kilts, and my son's dance kilts, I've never had one that you couldn't hang in the bathroom with a steamy shower and have it look like new!
I've never even had to iron a kilt at all before this one.

Sadly, he even had informal dance examiner feedback that his kilt wasn't presenting well due to the wrinkled look.

He no longer competes, so it's not such an issue anymore - but he does still wear the kilt for other occasions.

Does anybody have any idea of what might be possible?
Thanks so much --
(long time lurker on this forum, finally joined after 10 years to ask this question...)