I have never ironed after using spray baste....seems like a wasted step. I go right from smoothing the fabric onto the batting to the sewing machine....no waiting around for me! I have ironed after using glue to baste, to help dry the glue faster.

A side benefit of ironing is that the batting is flattened, making the quilt a little easier to push under the arm of the sewing machine. The batting puffs back up when washed.

My understanding is that there is no need to iron. It's just that it helps the basting spray dry faster and flattens the batting.

I didn't used to iron after spray basting, but the last couple of quilts I have and it seems to keep them together better. At least for me. I do my quilting on my DMS and this seems to help keep the back from getting kinks. I do the ironing on the floor which is where I spray baste and only go lightly over the back and front.

Like Furballs, I have recently started pressing after spray basting, relying on Ann,Peterson's Craftsy class. You end with perfectly flat back and makes FMQ much easier.

Glad you asked the question and I've enjoyed reading the replies. I've done it both ways. If I feel like it needs to be a little smoother, I press.

I had a little tuck in the back of a quilt that I had spray basted. I was at my lqs and mentioned it and she asked if I hadn't ironed the back. I hadn't. I had just smoothed it with my hand. I do iron after I spray now. The 505 still seems to wash out fine.

you could always test a small sandwich to see if you like the way your spray baste washes out.

I always iron after spray basting with 505 as per Ann Petersons Craftsy class, as previously mentioned. Have never had a tuck or pleat in my backing from quilting and I like the way it flattens all the layers nice and smooth for quilting.

Never heard of ironing after doing spray basting. I would be afraid of it setting the glue and that it wouldn't wash out.

I spot iron just to make sure there are no wrinkles, edges are attached and all is smooth for quilting. Have never had any problems.