Word of Caution: Wipe off descale solution immediately
I was descaling my brushed stainless steel breville with dezcal today and let the droplets sit on the body of the machine for 15+ minutes. Afterwards, as I was washing the drip tray, the drop marks were not going away from the stainless steel part. To my dismay, I discovered they were all over the front part of the body, and neither vinegar nor baking soda wiped them off.
Fast forward, it took hours of rubbing it with stainless steel cleaner/polish to dim/fade the marks. It looks much better now but they are still there.
Anyways, hope this prevents folks making the same mistake.