Replace floor with??

[Huron Blue]

Working on my new to me V20. All solid except the floor by the CC is soft. What do I replace it with 3/4 ply? Then what? It has rounded edges I will need to belt sand that but what then can I finish it all with to last a long time and look like the rest of the boat. Bed liner? Epoxy resin then bed liner?? I figured peopler here would know. Thanks!