carolynjo

Yes, the use of steam AND smashing with a mallet has been around for a long time and the amswer is a bona fide one; sometimes when many seams come to a point, there is a lot of bulk. Someone figured a good way to address the problem.

sewnclog

Yes it is a serious reply; sometimes using a slapper; helps 'flatten' the seam.

JanieH

I also use a rubber mallet (Harbor Freight!) for controlling unruly seams. And like you, I wish I could use it on certain people in MY life!

mac

Sometimes when you need to 'flatten' a seam, you can put a heavy piece of wood or other object on top of the seam after ironing it. As it cools, it will lay flat. I want to say "flatter", but is that the right word? I have a piece of a 2x4 board that I use sometimes. My friend uses a smooth flat iron (made of cast iron and used to keep bacon from curling up when frying) and is smooth to leave on top of her seams until they are cooled after sewing. It is surprising how flat they get the seams.

MadQuilter

I sewed a block with a windmill in the center and pressed the seams open. Worked like a charm.

QuiltnLady1

This is what I do -- I steam the seam and either use a hammer with a bit of fabric over it or a clapper. The hammer works best for the very thick seams.