Painting the underside of a swim platform?

While I have the boat out (again), I'm contemplating painting the underside of the swim platform. Its looking pretty Sh***y. I'm not sure what type of coating was there originally, but I hit it with a sander today, and a lot of it was loose and flake off, while some of it was well adhered

Conall's Boat Build: Aft deck and swim platform

Can I use topside paint as bottom paint on a trailered boat? – Jamestown Distributors

Advice on painting aluminum swim platform - The Hull Truth - Boating and Fishing Forum

Painting the underside of a swim platform?

How To Add A Swim Platform And Ladder To Your Boat

Print of alla prima oil painting, created with a palette knife of pool raft on summer afternoon, love pool time!

BE RIGHT BACK-raft, wall art, swimming, swim, swimming pools, oil painting, palette knife, raft, gallery wall, raft, pool artwork, swimmers

Conall's Boat Build: Aft deck and swim platform

Shop GARELICK Outboard Transom Swim Platform and Telescopic Ladder at West Marine. Visit for prices, reviews, deals and more!

Outboard Transom Swim Platform and Telescopic Ladder

Skipjack 262 hull repair and new bottom paint