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Porter's Bronze Verdigris is an ageing solution designed for use over Porter's Liquid Bronze. A chemical reaction between the Liquid Bronzecoating and the Bronze Verdigris creates a patination that is predominantly blue green, but can vary through shades of greens, browns, bluesand even lighter areas.
Cleaning materials
Water
Application Tools
Brush
When painted onto “high traffic” surfaces such as hand rails, door knobs etc continued touching of the surface will remove the verdigris effect. The verdigris effect can be delicate and will be damaged under such circumstances.
Do not apply in high humidity, below 10°c or above 30°c. Do not apply in areas subject to ponding.
Bronze Verdigris can be applied 24 hours after the last coat of Liquid Bronze.
Caution: Bronze Verdigris contains hydrochloric acid, so please always wear rubber gloves and safety goggles (refer to SDS prior to use). Lightly apply by brush one or two coats of Porter’s Bronze Verdigris. Allow minimum 3 hours dry time between coats. Verdigris appearance will begin to develop within hours and will continue to increase over the next 12 hours. To increase intensity of verdigris effect, up to three coats may be applied.
Please Note: Liquid Bronze treated with Bronze Verdigris is a chemical reaction. Individual results may vary due to film thickness, methods used, time elapsed, ambient temperatures, substrate etc.
Burnishing or polishing the finish:
Burnishing or polishing the finish after the application of the Bronze Verdigris is optional, and will create a subtle change in the final finish, where a slight shine is visible through the verdigris. Best results are achieved if the Liquid Bronze (with or without Bronze Verdigris) is left to dry and harden for 24 hours, as a hardened, cured finish is easier to burnish than one that is still slightly soft. Experimentation on a test panel is highly recommended, as abrading the surface will remove the verdigris finish to reveal the polished bronze. Varying effects will be achieved according to the application tool used to apply the Liquid Bronze, for example, if a roller is used to apply the Liquid Bronze, once burnished, creates a subtle, authentic cast bronze effect. Imagine viewing the surface microscopically, where the burnishing removes and polishes the tops of the “mountains”, while the verdigris finish remains untouched in the “valleys”. There is no standard method or fixed result when at the burnishing/polishing stage – be artistic and experimental and create your own unique finish. Burnishing: Allow finish to dry for a minimum of 24 hours before burnishing or polishing. Always wear a dust mask, safety goggles and gloves. For best results Liquid Bronze should be polished mechanically with a 1000-1500 grade sanding discs.
Sealing afterwards:
If a clear sealer is required, we recommend Porter’s Stucco Wax, although it must be noted that this will change and darken the final result. Perhaps do a small sample board first to check the result before sealing your main project. Allow the Bronze Verdigris to react and dry for at least 48 hours prior to sealing. This can be used either internally or externally. If used externally or in high traffic areas, reapply every 6- 12 months.