With the pounce chalk - it depends on the version. The original version required only dusting off. There is a second/newer version that requires heat to be removed. I have the original and it does dust right off. But frankly, I've never been overly successful with using the pounce pad.
I use a #2 mechanical pencil to mark light fabrics and the Bohin mechanical pencil with white lead for dark fabrics. Only once have a had an issue with the regular lead not washing off but I used a very heavy hand as I had changed my mind re the design. It took some doing, but I was eventually able to get those dark marks out as well.
I then toss my quilts into the washer on a permanent press cycle; warm wash; regular detergent. Dry on the permanent press cycle in my dryer. I don't treat them gently. The recipient isn't likely to, so why should I?