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11
FINE FINISHING
The action of the Delta Finishing Sander causes thousands of tiny abrasive
grits to move in circular orbits against the work at high speed. Each grain
moves in the same direction at a constant speed so the cutting action is uni-
form over the entire pad surface. Crossing and re-crossing of the abrasive
grits from all directions quickly levels surface irregularities to a fine, uniform
smoothness. Start the work with an abrasive grit just coarse enough to
remove the high spots and excessive roughness. Follow with a second sand-
ing using a grit one or two grades finer. Continue with successively finer grits
until the desired finish is obtained. DO NOT GO FROM A COARSE GRIT TO
A VERY FINE GRIT IN ONE STEP.
Going from a coarse grit to a very fine grit in one step could make it difficult
to remove swirl marks that might have been made by the coarse grit abrasive.
Use the finest grits practical for the roughing operation and then finish by
using successively finer grits.
REMOVING PAINT AND VARNISH
Read and follow all instructions in the ADDITIONAL
SAFETY RULES FOR PAINT REMOVAL section of this manual.
Your sander will do a good job of removing old paint and varnish if two pre-
cautions are taken. First, be sure to use a coarse, open coat abrasive to avoid
the usual clogging of the abrasive surfaces. Second keep the machine mov-
ing over new areas to avoid heating and softening the material being removed.
Try to work the entire surface down at the same time by working in wide, over-
lapping arcs. Do not concentrate on small areas. If liquid removers or heaters
are used to speed the work, be sure the surface is cool and dry and the
excess material has been scraped away with a putty knife or other suitable
scraping tool before applying the sander.
CABINETS AND DOORS
The orbital motion of the Delta Finishing Sander is ideally suited for finishing
doors, cabinet fronts and other installations where wood grain is often per-
pendicular to that of a joining piece. Since the motion is circular, the machine
may be moved in any direction and crossed from one part to the other with-
out regard to direction of grain. A uniform and smooth finish will result on both
parts. The same procedure may be used when evening joints in all types of
cabinet work. The sander may be worked on both sides and in all directions
to obtain a smooth, matching joint. By properly changing from coarser to finer
grit abrasives, an excellent finish will result.