Yes, shined is a Scrabble word!

Verb

1. Be bright by reflecting or casting light

2. Emit light; be bright, as of the sun or a light

3. Be shiny, as if wet

4. Be distinguished or eminent

5. Be clear and obvious

6. Have a complexion with a strong bright color, such as red or pink

7. Throw or flash the light of (a lamp)

8. Touch or seem as if touching visually or audibly

9. Experience a feeling of well-being or happiness, as from good health or an intense emotion

10. Make (a surface) shine

11. Climb awkwardly, as if by scrambling