Extend the blend beyond the repair and use a physical direction guide so the new grain does not stop as a visible patch.
Control abrasive freshness, lubrication, pressure, and dwell so titanium cuts cleanly instead of smearing or overheating.
Choose the tool by edge length and access, then prove the brittle oxide is gone without rounding the cut geometry.
Use reference panels, fixed stroke direction, and blend boundaries to hide repair scratches without creating wandering grain.
Control pressure, temperature, direction, and panel support so cosmetic refinement does not dish or distort thin aluminum skin.
Diagnose powder-coat texture, confirm cure and recoat compatibility, and level only enough film to create a uniform tested substrate.
Build a straight reference, standardize stroke length and overlap, and prove the pattern on a sample before touching a spar.
Inspect welds, drain holes, chips, rust creep, and unknown repairs. Confirm the new coating system accepts the old finish before deciding to scuff the whole frame.
Decide whether sound nickel plating needs only a controlled scuff or whether corrosion, lifting layers or an incompatible coating require a different repair.