Leslie's has a diving board resurfacing kit for $55 from Smart Seal.
20x40 in-ground concrete "vintage" pool
Approx 35k gal
Concrete, plaster and epoxy paint
DIY plaster resurface repairs completed 6/2015.
Try a pressure washer on the fiberglass board. Did my 22 yr old board and it came out pretty descent considering how stained it was.
38000 Gal, IG, Plaster, 20' x 40' x 10', Attached Raised Spa, Intelliflo VS 3 HP (011018), Pentair Quad DE 60 Filter, Raypak (Rheem) 400,000 BTU (407a low Nox), Easy Touch 8 upgrade, Screenlogic 2 with wireless, IS-4 Spa Side Remote, Stenner 45MPHP10 w/15 gal tank, Intellibrite 5g (3), Dolphin Triton Plus robot with PRO remote, Water Tech Catfish handheld vacuum for spa, TF100 with SpeedStir.