No need to deal with an unprofessional mechanic, take it to the experts. You'll feel better about flying your plane after an expert eye gives it the once over.

I bought a Glasair many years ago and insisted as part of the sale the aircraft be looked over by Phoenix Composites who were the hands down Glasair gurus at the time I bought the plane almost 20 years ago. It was about an hour's flight away and seller begrudgingly agreed. The experts found several minor discrepancies that over time could have become major ones, they fixed them all as part of the sale. I completed the transaction with the seller, then had the expert who did the prebuy, complete a condition inspection. I have never regretted the decision to go the "expert" route! Plus I learned a lot from the expert who did the inspection.