No.
Allow me to clarify and be specific.
Whether you need to clay or not depends on,
The contaminant itself. There's a difference between DOT highway paint and bug poop and how tough it is and how strong of a bond it has on the paint.
The pad you're using and even the tool. There's a HUGE difference between cutting paint with a wool pad on a rotary buffer and an aggressive compound and ANY tool or product when using foam pads.
Foam pads, even foam cutting pads can simply GLIDE over some bonded contaminant and have ZERO effect.
So what I've been TYPING for at least 17 years now online is this little quote,
The most effective way to remove above surface bonded contaminants is by claying the paint - Mike Phillips
When I first started typing that the Nanoskin towels, pads and wash mitts and all the copies of their products had not been invented yet.
I can also tell you from first hand experience, if you don't clay first, and there are bonded contaminants, on dark color paints as you move a foam pad on ANY orbital polisher over the paint, in the residue you see behind the path-of-travel (of the pad over the paint), you will see what looks like Comets, that is a dot with a trail behind it. That is the contaminant and the trail is how the residue visually forms on the surface after the pad moves over the surface.
Been there, done that and seen it.
Try to find the above info anywhere else.
:laughing: