Great Gate, Trinity College, Cambridge. c.1630

Heraldic devices were dry-cleaned, followed by localised re-gilding and touching-in using an acrylic co-polymer dispersion and light-stable pigments. These were matt varnished using the same medium but with anti-oxidants and ultra-violet light corrosion inhibitors for non-yellowing.

The great oak doors were dry-cleaned with soft brushes and glass fibre bristles together with vacuuming. New green oak inserts were patinated with natural sepia pigments.

The gates were waxed with a Cosmolloid/Ketone mix with corrosion inhibitors added, to allow the beauty of the aged oak to be kept, whilst giving protection from the environment.