These are the two-part bleaches.
parts are usually sodium
hydroxide and strong hydrogen peroxide.
When they are mixed together they
become a strong
This is very effective at removing
the natural color from
These two part solutions need to be
washed off with a
'neutralizer' such as plain water, water mixed with white vinegar or
solution recommended in the instructions that come along with the
Boat Books on-line
your wood down to a reasonable finish before bleaching, so the
do its work properly.
Once the wood stains have been
bleached you should only
sand it lightly with a fine grit to remove the grain that has been
the bleach and the neutralizer.
Use some cheap disposable brushes to
apply the bleach as
they will not be fit for any other use afterwards.
If using oxalic acid, mix a solution
of dry crystals in
hot water and apply to the entire surface, not just the stain.
You may need several applications
allowing it to dry
overnight drying in between coats.
Once you are satisfied with the
results and the area is
perfectly dry any residual oxalic acid must be washed off before
using a two part peroxide
bleach, wash the area down with mineral spirits after sanding and allow
dry well for a couple days.
Then using a paint brush, apply a
generous even coat of
the first part of the bleach.
sure that there are no
drips or missed spots, then wipe off any excess with a rag.
Allow this to stand for about 5 or 10
Then apply part two, using a separate
Make sure that you cover all the
areas treated with the
Again wipe off any excess with a
clean rag and allow it to
sit for a few hours before washing down with the neutralizer.
Allow to dry at least overnight
before attempting to
finish or if necessary, applying a second application.
If you end up with a few streaks or
an uneven tone you may
have to rectify this with a final treatment of oxalic acid.
General Finishes Oil Base Stain Wood Samples
from: Rockler Woodworking and Hardware
The bleaching will remove the woods natural color so you
staining after bleaching.
One way to avoid bleaching might be
to use a darker stain
to blend the wood stains.
You could try a pigmented stain on an
area you want to
make lighter, but this will have only a minor effect and you will hide
Pigmented stains, unlike dyes are not
Bleach can be dangerous if not handled properly.
Always use rubber gloves, eye
protection and avoid
If you do get any on you skin rinse