GOLDEN GAC 400

I bought this product to stiffen some cut fabrics for a wall hang. The bottle says it is for natural fabrics, but I decided to try it on synthetic fabric anyway. It worked pretty great on most (fleece, corduroy, velvet lace). I did use it on one natural fabric piece (regular cotton, tan in colour) and my only advice is that on that colour was that it does slightly darken it, so I had to cover both sides.
It's nice to have a more permanent option for stiffening fabric that isn't starching them. I imagine the product would be really great for stiffening crochet projects such as snowflake ornaments.