Q. I have to stain some white
pine woodwork in my home. In the past, I have had nothing but problems
when I stain wood. The color is not even, the grain disappears and colors
are much darker than in the sample brochures. I must be doing something
wrong. How can I get professional results from start to finish when staining
woodwork? - S.B., Westland, Mich.
A. I see you have the softwood
blues. I used to get into this same funk many years ago when I first started
in the construction business. Imagine my customers' reaction when
I transformed beautiful white pine woodwork into a blotchy mess.
My initial diagnosis was that
the wood had not been sanded well enough. But I still had problems when
the wood was as smooth as glass. I continued to ruin gorgeous pine trim
because I did not understand that softwoods must be treated with the utmost
care when they are stained.
White pine, alder, spruce and
fir are softwoods that have a very open cell structure. They readily absorb
massive amounts of stain, much more than you and I want them to. Hardwoods
such as oak, poplar, cherry and walnut are much different. Their dense
cellular structure make them harder; because of this, there are simply
fewer voids for the liquid stain to penetrate. A suitable comparison might
be comparing two different pieces of paper. A paper towel readily absorbs
water drops, while a drop of water may sit for minutes on the surface
of glossy paper used in many decorative coffee tables books.
When I decide to stain softwood
lumber, I do what professional painters and woodworkers do and use a clear
conditioner to partially block many of the wood pores. These conditioners
are easy to apply and dry rapidly. Often you can brush them on the piece
of wood and be able to stain within 15 minutes.
The liquid conditioners contain
clear resins and solids that clog the pores of the softwoods. By doing
this, many of the stain pigment particles that create the actual color
are not allowed to soak deeply into the wood. The conditioners also help
to enhance the grain of the wood.
Sanding is still extremely
important when staining wood. Roughly sanded wood exposes more surface
area, which allows too much stain to soak into the wood. When you take
the time to use progressively finer and finer grit sandpaper to eventually
produce a glass-like surface, you minimize the surface area of the lumber.
Taking the time to fine-sand until the wood surface is super-smooth also
is key to achieving a silky surface after the final coats of finish are
applied.
After you have sanded the wood
and removed all dust, apply the clear conditioner. Pay attention to the
instructions as they often state that any wood treated with the conditioner
should be stained within two hours.
Apply the stain and work it
in well with a rag or brush. Wait perhaps 30 seconds and wipe off the
excess stain. All too often people make a mistake by either rubbing too
hard or using a rag that is saturated with stain. (It's a good idea
to practice first on some scraps of woodwork.) Keep in mind that the depth
of color you see the moment the stain is wiped off is generally what the
woodwork will look like after the clear finish is applied.
Be sure the stain dries before
you proceed. If you try to rush the job, the clear finish can lift stain
from the wood, resulting in a blotchy mess. Your choices for clear finish
coats are many. Lately, I have become a huge fan of water-based clear
urethanes. They are easy to apply and dry rapidly. When I use these, it
is not uncommon for me to apply two or even three coats of finish in the
same day. That can be a huge timesaver.
When working with any clear
finish, be sure to check the work as you apply the finish. If you apply
too much clear finish, it may sag or run in spots. After you apply the
finish to a vertical surface, you have a window of opportunity of perhaps
5 minutes when you can correct these errors with your brush instead of
waiting for the finish to dry and then sanding out the defects.
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