Busy fityting my new (to me) toy, which came with a transom mount depth transducer.
Said transducer had been fitted internally to the previous owner's boat, so I have spent a couuple of evenings carefully chiselling off the epoxy that held it in. It's now back to plastic but with one tiny groove on the bottom face caused by the chisel when I probably should have stopped chipping & gone to bed 10 mins before.....
So, the question - knowing it has to work in as smooth water flow as possible, should I be sanding this "deep scratch" out the plastic, or are they robust enough to handle that kind of damage? I assume some must have worse from being grounded? (scratch is about 4mm long and about 0.25mm deep)
Also can anyone tell me how smooth the surface is on a "fresh" one? (or do I need to polish it - or will a careful circular sanding with an old rag & 1200 grade wet'n'dry be sufficient?