Cleaners and Restorers
Uncoated, weathered cedar can often be restored to its
original color by applying commercial products called
cleaners, brighteners or restorers. Although intended
primarily for restoring horizontal wood surfaces, they
generally work almost as well on vertical surfaces. Some
products are formulated with thickening agents to help
the liquid cling better to vertical surfaces. The manufacturer's
instructions should be followed for optimum effectiveness.
Commercially available cleaners and restorers generally
fall into three categories: paint strippers, bleaches,
and oxalic acid-based formulas. These products contain
hazardous ingredients and should be used with caution.
Paint Strippers
Paint strippers will also remove oil-based stains and
latex stains. Most are supplied as ready-to-use liquids.
After use, residual stripper should be thoroughly rinsed
from the wood surface before any other coating is applied.
Bleaches
Bleaches are effective in counteracting mildew but do
little to remove dirt or other surface deposits. Aggressive
scrubbing with caustic cleaners such as bleach will
remove surface wood fibers and result in the wood having
a rough, unnatural whitish tone.
Oxalic Acid-Based Products
Oxalic acid-based products remove extractives bleed
and iron stains but are not effective against mildew.
After application of these products the wood should
be thoroughly washed with clean water and allowed to
dry completely before finishing.
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