I've hauled it home and am in the process of removing the remaining dirt. I can tell you this boat was rode hard before it was made a planter with really janky repairs made to seat braces, stringers and gunnel supports.
I'm going to try to carefully remove the lovely latex paint to expose the original graphics (a LOT of really cool candy panels and fades), but the graphics underneath are paint (probably lacquer) not gelcoat. Going to try isopropyl alcohol on the latex and see what happens.