At one time creating a fine woodworking project always included many hours of hand sanding to smooth the surfaces to a point where stains and topcoat finishes could be applied. Where oil has only one ingredient varnish contains resin and solvent.
In fact the finer the grit the wood is sanded to the less color a stain leaves when the excess is wiped off.
Sanding before natural oil and wax on wood fine woodworking. I have been applying coats of formby s tung oil on a bowl for several weeks now trying to arrive at one final smooth coat. For today s woodworker a paste wax wood finish of any kind may not be the best choice for protecting woodworking projects. Just like a polyurethane.
He advocates sanding through 500 grit and then polishing the wood further with 0000 steel wool. Danish oil finish mixes oil and poly. I noticed that you never mentioned ultra fine sanding before you polish with the.
The oil hardens through a chemical reaction called cross linking or polymerization by intaking oxygen. This will create a slurry of oil and wood dust filling tiny pores and leaving the surface even smoother. Unless all traces of sawdust and sanding dust are first removed any finish you apply whether it is a coat of paint or stain plus topcoat is doomed to be imperfect although the finest dusts are virtually invisible to the eye if they are left on wood surfaces when you apply paint stain or varnish the surface will turn out muddy in color and rough to the touch.
To speed the process or create a slurry to help fill open pores sand the oil into the wood with fine wet dry paper. Sanding finer than 180 or 220 is wasted effort in most cases as explained in the text. In fact the photos illustrate this being done on apparently unfinished wood but many authors including in the pages of fine woodworking have argued against ultrafine sanding because it can interfere with the subsequent finishing process.
A paste wax wood finish looks great but isn t very protective. After wet sanding with 600 and 1200 grit wet dry sandpaper i finally have an even satin finish. Danish oil often lumped in as an oil finish is actually a thin oil and varnish.
Then a stain was applied and the excess wiped off. Most of that labor went by the wayside with the advent of portable power sanders. Some examples of drying oils include tung oil linseed oil and walnut oil.
I plan to polish the finish next by hand. In this case the top half was sanded to 180 grit and the bottom half to 600 grit. So in actuality they cure rather than dry.
Sanding oil onto the wood surface with wet dry paper helps fill pores with the swarf oil slurry you create and it can result in a smoother finish. It doesn t do much at all to repel water isn t hard or durable enough to protect the wood from dings and scratches and with a low melting point of about 140. For a smoother richer finish repeat the process this time sanding the oily wood with fine wet and dry sandpaper.
Portable belt sanders orbital and random orbit pad sanders and oscillating detail sanders eliminated most of a woodworker s hand. A drying oil is one that will harden to form a solid film after exposure to the air over time.