The Golden State: Where & How to Live, Secure, Visit, Enjoy and Thrive in California
Coloring Finishing And Painting Wood
A second coat can best be applied as soon as the first one has become set or dull. After a filler has been rubbed, it is wise for an inexperienced workman to examine portions of various surfaces of a filled article using a pocket magnifier of from 12 to 18 enlargements. A hand-glass of even lower magnification will help. If the filling is not well done, the glass will show it instantly, Fig. 14. Additional coats of filler can be applied, if the pores are not full, after rubbing off the excess from the first application. It is thought best by many finishers to paint another coat of rather thin filler over the rubbed surface as soon as possible, at least before the mass in the pores is thoroly dry and hard. This second coat of filler can be rubbed when it has set just as was the previous application; and, usually, a satisfactory level surface properly filled is the result. Sometimes a second or third coat is given to a filled surface that has dried hard, and the result is generally satisfactory.
135. Drying Paste Filler.—The rapidity of drying of paste filler depends upon atmospheric conditions, such as warmth and dryness, and also upon the amount and the kind of oil used, the quantity of driers, and the volatility of the solvents. Raw linseed-oil in the mixture and damp cool air check or slow up the drying of filler in wood. Under ordinary shop conditions most of the standard paste fillers sold on the market should have at least 48 hours to dry before shellac or any other finish is applied over them. Sanding can generally be done after 24 hours. Oxidation of linseed-oil, especially raw oil, is a slow process; and, as there is linseed-oil in paste fillers, plenty of time must be allowed for the drying of the filler or various finishing troubles may follow later on after the article is varnished.
136. Sandpapering a Filled Surface.—Filling always leaves a slightly rough surface, which should be sanded very lightly with No. 00 or No. 000 sandpaper. Small fragments of filler may be left on the surface after rubbing; the filled surfaces in the cell cavities may be slightly rough or not quite level, this condition being revealed by a magnifier; and in addition to these, the fuzz on the surface of the wood may have been very slightly raised by the oil in the filler or the solvents that were used to make it spread to better advantage, Fig. 15.
