Inspect.
Look under direct and diffuse light. Check material condition, previous repairs and the areas that need restraint. Agree the finish to work towards.
THE WORKING SEQUENCE
Slow enough to see.
A careful finish begins before a machine touches the paint.
Prepare.
Clean away loose contamination before touching the finish. Protect vulnerable trim and test the chosen process on a small area.
Refine.
Work in controlled sections. Use the least aggressive suitable method. Keep checking rather than relying on a fixed number of passes.
Review.
Check the finish in changing light. Complete glass, seams and touch surfaces. Make the aftercare as clear as the work itself.