VaporMG discoloration and corrosion?

[Giggitygoebbels]

So,i bought a surface RT about a month ago,and just after a few days after using it,the sides just discolored from black to dark gray,and furthermore the fingerprint marks stay on it,which makes it look ugly.A few days ago,I also realized the area where the kickstand is opened is corroded as well,with small circular things popping out,and if you remove them with the fingernails,they grow back again.
Is this normal?Should I attempt to RMA it?It is annoying,and i do not know if the corrosion is poisonous or something.
Thanks for any advice.