1) Protective coating of edges: before the full application of the various paint layers surfaces which are difficultto reach such as edges, corners and welding seams are primed by paint brush application. Edges causedby wet paint are also smoothed out by paint brush. Visible brush strokes are unavoidable in this area.2) Acceptance criteria (tolerances) for dry film thicknesses (DIN EN ISO 12944-5 and ISO 19840):a) Arithmetic mean for total readings ≥ 100 % NDFTbb) Minimum dry film thickness ≥ 80 % NDFTb (partially, locally, e. g. rib sides and rib bottom)c) The maximum number of measurements allowed to be repeated is limited to ≤ 20 % of the totalnumber of measurements.d) Max. allowable dry film thickness (secondary) at difficult to access areas (see note 4):· Priming coat (GB) ― Dip priming method = (2 x NDFTb)· Priming coat (GB) ― Spray priming method = (2 x NDFTb)· Intermediate coat (ZB) = (2 x NDFTb)