I would check youtube for videos on golf club rust removal. I would use steel wool lightly myself and a Scotty Cameron wiping cloth.

I would consider sending the putter back the SC Custom Shop to be restored. Then upon receipt back I would use a SC Oil Cloth after every round to clean off. You have a model of putter that is obviously prone to rust (is it is made of carbon steel) unlike most other models (aluminium or stainless steel) that do not.

That is a fine putter...
I have used Bartenders Helper to remove rust.
Wet your putter and sprinkle a little helper on the surface and wipe with a sponge.

Should do the trick!

Cheers,
Dr. K

Not sure I can add anything to the debate but I must say I admire your taste in putters...
I've had the pleasure to have owned a few, including a Newport 2 that had cross-hatching on the face.
I never could keep the rust away from that face - it had a fleece lining in the head cover that certainly didn't help but it seemed to attract dampness.
I even used a smear of machine oil on the face in an attempt to keep the rust away.
Lost patience with it in the end and P/ex'd it for something requiring less maintenance.

Seems that Scotty has come on considerably since those early models.
Good luck with your acquisition
JT

For small bits of surface rust, I have found that Flitz works the best and is not too abrasive that you need to worry about it removing the finish.

TH

00000 steel wool, go to a hardware store try a product called Flitz. Has worked fairly well for me over the years..

Does anyone know if the Putter Statistics changed from 2018 to 2019 for the Crown Cameron Newport 2? I can’t find a 2018 now and seemed like it was heavier and had a harder club face(more of a click) to it... Thanks!!

I have used regular oil with a toothbrush