English to Italian Tech/Engineering Art, Arts & Crafts, Painting

SURFACE PREPARATION:
Surfaces should be clean, dry and free from dirt and grease.
If painting a new plaster surface, prime wall with a commercial primer/sealer designed for raw plaster.
Use a white base coat to achieve the most dramatic color effects.
APPLICATION:
Stir contents before use.
Do not shake.
Apply by brush, roller, or spray gun.
Apply in thin uniform coats, using a good quality brush or roller.
Use overlapping strokes, keeping a wet edge.

Ho capito che "wet edges" vuol dire che quando pitturi ti muovo da una parte (secca) senza pittura fino a sovrapporti alla pittura esistente (bagnata), ma "margine bagnato" non sembra proprio esistere, se non in pochi casi.
Suggerimenti???