In the olden days ... pre Best Press, I used spray starch.
So I know all about scorching!! That was why I switched over.
Have never had a problem with Best Press.
I spray with the BP ... and don't wait all that long, til I press.
More like seconds ... not minutes/hours/days!
Certainly no significant time lapse.
BTW ... I use an Oliso on the high setting.
(Know nothing about Terial Magic.)