We can Say:
He �s a happy smiley person. (a cheerful person)
She �s a smiley person. (a cheerful person)
What a happy smiley face. (happy looking)
She �s full of smiles. (a cheerful/ happy person)
She �s all smiles because she passed her exam. (She �s happy/ pleased)
Silvery is rather poetic. .....By the light of the silvery moon. I wouldn �t normally use it with watch on it �s own. (silvery watch)
...for a watch not made of silver, but metal etc. that looks like silver:
silver-looking watch or silvery-looking watch.
Pollution put a silvery sheen on the surface of the water.
Other native speakers may use these words differently. 8-)