I have no platinum experience.
But i have stainless steel experience. Normally 316L i guess.
With cape cod you can do much with stainless steel.
But 100% new condition i did never get the scratches away.
A top AD who deliver an undamaged watch is in my opinion the best to have.
It is hard to find them. It is easier for me to find a top notch watch.
Live with it is a no go. So there must come a solution for this problem.
In my opinion a good AD change your watch for a brand new peace, and sell the polished watch as a second hand watch with box and papers.