How to Sign "Face"
Make a D-shape with your dominant hand (index finger extended, three remaining fingers touching the tip of your thumb). With your index finger, draw a circle in the air around your face.
Make a D-shape with your dominant hand (index finger extended, three remaining fingers touching the tip of your thumb). With your index finger, draw a circle in the air around your face.
Sign 'wash' by making circular rubbing motions with your hands, then use your dominant hand's extended index finger to trace a circle around your face.
Point to yourself for 'my', sign 'cold' by bringing your arms in and shivering with S-shaped hands, and then trace the perimeter of your face with your index finger.
Sign 'smile' by drawing the corners of your mouth up with your index fingers, then sign 'face' by tracing a circle around your face with your dominant D-shape hand.
Sign 'wash' by making circular rubbing motions with your hands, then use your dominant hand's extended index finger to trace a circle around your face.
Point to yourself for 'my', sign 'cold' by bringing your arms in and shivering with S-shaped hands, and then trace the perimeter of your face with your index finger.
Sign 'smile' by drawing the corners of your mouth up with your index fingers, then sign 'face' by tracing a circle around your face with your dominant D-shape hand.
No, you do not need to make physical contact with your skin. Simply trace the circle in the air just an inch or two in front of your face.
Generally, it does not strictly matter, but most signers naturally start at the top of the face, move down the dominant side, across the chin, and back up the non-dominant side.
For this specific sign, you should stick to the D-shape with just the index finger extended. Using an open hand changes the meaning to signs like 'appearance' or 'looks'.