I have a quilt that is for a show in September. I want to present my quilt as well as I can and I think blocking it is a good way to do that. Problem is I don't want to completely soak this quilt. Biggest reason is I'm worried about colors bleeding. This quilt is a lot of red batiks with light colored batiks. Recipe for disaster. Fabrics weren't prewashed because many were scraps and small pieces. I had no intention of washing the quilt so wasn't worried about it but I didn't consider blocking when I was first assembling the top. Here's my question; is it possible to pin the quilt out and get it all squared up then use a steam machine over the top of it? This quilt doesn't need any major adjustments, just a nice flattening out and sides pulled straight. I have quite a bit of polyester thread in the quilt though, will steam hurt that? Any advice from those who have done this is greatly appreciated!