I would like to know the best sunscreen for your scalp? spray, non greasy but open to suggestions.

Try several: You can try several brands to see which one you like. Make sure you cover very well your scalp as spray on sunblock tends to miss areas. Be aware that you need to re-apply the sunblock every 2 hours because perspiration dilutes the sunblock and renders it ineffective after that period of time. Also, try to wear a hat. The combination of sunblock and a hat will protect you more.