I used this punch a couple of weeks ago to install an EI Commander. Our panel was hydrodipped simulated carbon fiber. I protected a large area around the hole with masking tape, but was surprised at how much of the hydrodip was damaged by the process.
Fortunately, the instrument covered all of the damaged finish on the main part of the panel. The finish came off completely on one edge when I (carefully) removed the masking tape. It was 3M painters tape and wasn't on the panel more than an hour.
So if you have a hydrodip finish, be careful!
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Krea Ellis
Locust Grove, GA
DA20-A1 "Princess Amelia" - gone home to Amelia Island
RV-7A Phase 2
RV-10 under construction at Synergy Air South
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