Is this sign used for 'ice cream' too?
No, 'ice cream' has a completely different sign. To sign 'ice cream', you mimic holding an ice cream cone in your dominant hand (using an 'S' handshape) and bring it to your mouth as if licking it.
Can I use this sign for lotion or skin cream?
No, this sign is specifically for dairy cream or culinary cream. For skin cream, ointment, or lotion, you would use a mime-like gesture of rubbing the product onto your hands or arms, depending on where it is being applied.
Does the 'C' handshape stand for the word 'cream'?
Yes, this is an initialized sign! The 'C' handshape represents the first letter of the English word 'cream', combining the letter with the visual action of skimming cream off the top of milk.