If you use pva glue neat on a crown you will need to line it never apply neat to brim as it leaves white surface best for.
Best spray starch for stiffening.
2 spray starch use spray starch on a semi stiff hat.
It will also hold a crease in place like nobody s business.
Commercial spray starch such as niagara or faultless is made from a grain either wheat rice or corn and is used to add stiffness to fabric.
Then you can always use interfacing when the pattern calls for it.
Sugar and water are another two ingredients that can provide a temporary stiff nature to the fabric.
Interfacing helps your garment to be stiff in the right places while not sacrificing comfort.
3 zapon zapon varnish for metal can also be used when diluted.
One very good starch spray is aleene s original stiffen quick.
It is specially for craft work so it works good.
Yes fabric stiffener spray is available in the uk.