Liquid Bar Keepers Friend
$2.97/The Home Depot
Features: Mildly abrasive, this liquid has oxalic acid as an active ingredient. Captains use it only on nonskid, where gloss is not an issue.
Instructions: Apply directly to the wetted nonskid surface, scrub and rinse.
Performance Report: It did not completely restore deck test spot to white. It turned the wine stain dark gray and only bleach removed it. It substantially removed the cola stain. Its detergent and abrasive action removed the dried-on guts and blood.