If time enough can be had we can prime with oil alone, or in connection
with the leads or minerals, and be sure of durability; but in these
days of "lightning speed," "lightning illuminations," and "lightning
painting," we must look about for something with "chain lightning" in
it, which, unlike the lightning, will remain bright and stick after it
strikes. We all have to paint according to the time and the facilities
we have for doing the work.
The scale on iron or steel is the only serious trouble which the painter
has to contend with. Rust can be removed or utilized with the oil,
making a good paint, but unless time can be given it is better to remove
the rust.
If possible let tanks get thoroughly rusted, then scrape off scale and
rust with files sharpened to a chisel edge, rub down large surfaces with
sandstone, and use No. 3 emery cloth between rivet heads, etc., then
wash off with turpentine. This will give you a good solid surface to
work upon.
For priming I use 100 pounds white lead (in oil), 10 pounds dry red
lead, 13 pounds Prince's metallic, 8 quarts boiled oil, 2 quarts
varnish, 6 quarts turpentine, and grind in the mill, as it mixes it
thoroughly with less waste.
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