Sanding wood before finishing. recommendations
If and only if - perhaps it is the criteria which you should rely.
And how to determine the "necessary and sufficient"?
You should begin, I think with what kind of coverage will be on the product. To paint is to be some criteria for a transparent finish the others.
Let's just us think.
After planing power tools small waves are formed on the wood chips may occur. Usually it is removed by grinding along the fibers and filler embedded chips.
It probably will be the test of "necessary". Next, it is logical to assume that it is possible to polish a rough paint and varnish more carefully ...
Reasoning on this can be completed. It takes practice.
I share what is turned out.
For coniferous rocks often enough finally sanded with 120 grit sandpaper.
A more thorough sanding is justified if a clear finish and finish especially oil, because under the oil will be clearly visible scratches and the possible appearance of contamination of the product.
For hardwood sawmills grinding in most cases can be finished with sandpaper grain 180.
Particular attention should be paid to polishing the ends of details, as it happens at the ends of pulling the fiber from the mills or saws.
And to test the quality of primary grinding and preparing to finish, in the old books recommended to moisten the details (then immediately see all the flaws), and after drying to remove the pile.
You can also use the side lights to check the quality of grinding. When light up the part along the surface, clearly visible scratches at the top of their coverage will not see.
This is perhaps the main points of grinding... And what would you not polished (I mean different polishers) We need to grind as possible along the fibers.
Thank you for reading and... until the next publication.
I will be glad of your support in the form of a husky and a subscription to the channel.
Alexander.
On a note:
All articles of this channel is based on materialsmysite -"Joinery"
Other publications in the channel:
As to the circular saw to make a decorative cover
Whether to follow the advice of carpenters from YouTube
How quickly do a simple miter box
What can be made of old boards