To get the best results you can use methylated spirits or mineral turpentine, If you can't get hold of these, vinegar and lemon juice will work just as well.
Melamine is a hard resin used as an overlay for building materials such as MDF or plywood. Melamine is an organic compound when combined with formaldehyde forms a durable thermosetting plastic.
Yes, white melamine will stain but you can get them off.
Over time the white melamine will turn yellow but you can wash it to make it white again.