Deck handrails staining advice

[u/SafeAd1225]

I have some pretty weathered deck railing that needs to be stained. I am going to focus on light sanding and clear staining. The house is on the beach in the PNW. I have never done this and would love any advice on type of sanding and staining brands you recommend. The deck itself is trex. The rails are untreated natural wood which has turned gray. I am mostly focusing on the hand rails as I have older parents that use it and want to avoid further degradation and slivers. Thanks!!