If you have an oil based paint on your wood then i d clean them with tsp if you intend to repaint that wood.
Cleaning painted wood before repainting.
In general it s not great idea to use water on your painted wood so dust frequently to keep from having to deep clean more than necessary.
Paint cracking on walls and ceilings happens due to a variety of causes one of the most common being poor preparation of a surface prior to painting.
Before painting apply primer to the old wood surface whether it is indoors or out.
Painting season may be waning and you need to paint sooner rather than later.
But there is no point whatever in cleaning bare wood with tsp or latex painted wood with tsp.
It is important to remove any flakes from the surface via sanding or scraping before repainting.
Here s how to take on the task.
You want the absolute best adhesion surface for your paint.
When the wood is clean and smooth use a latex based primer especially made for exteriors to prepare the surface for a new coat of paint.
If there are creases or hard to reach small places on your wooden surfaces use a small scrub brush or toothbrush to clean it.
There are ways to safely clean your house before painting using a pressure washer including using lower psi pressure washers widening the spray and standing at least two feet back.
Painting over cracked paint is a bad idea.
Primer helps paint stick and improves the coverage so you can dramatically change the color of the old wood if.
But as long as you don t use water.
If you do use tsp then i would also clean the residual tsp off the piece of furniture with a clear water wash or denatured alcohol.
Painted wood takes a little extra care to clean but that doesn t mean it s impossible.
Time is of the essence.