Hi everyone!
I'm pretty much still a jewellery newbie, so apologies if my questions seem a bit silly.

I took some brass work to be silver plated and got it back yesterday from the platers - only to notice when i got home that on my shiny plating some strange little residue marks left on it.
I know the platers were very busy, and were rushing to finish my work when i got there so i think on a normal occassion they would have got this off before giving it back to me (I've had silver plating done a few times now and never seen this before!).
I also know the marks weren't on there when before the plating!

Hmmmm.. anyone know what the marks might be and/or how to get them off without damaging the plating? they almost look like water marks/like when you put a sticker on something and peel it off and it leaves behind a residue (but its not sticky at all!)

I got some gold plating done too at the same time, and there were no weird marks left on that!

Thank you so much in advance if you can help!