Jun/Jul 2008

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"PURDOM ANSWERS SEABOLD"

By E. S. Purdom

Rt. 1, Box 506, Franklin, N. C. 28734

Reader Robert Seabold asked about "the thick porcelain like coating found on some old castings."

Most likely the material refered to is Rough Stuff, this was used over an oil primer to build a good surface for finish coats.

After work was primed it was spotted, a hard drying putty was knifed on, filling all holes, cracks, etc.

After sanding a thick smooth coat of rough stuff was brushed on, If needed a second or third coat was applied, sanding between coats.

After hard and dry and good clean up the color and varnish was applied. Varnish was rubbed out with ground pomice and water. Work and material was kept warm and dry, 80° was ideal.

Rough Stuff 3 parts whiting, 2 parts dry white lead, 1 part white lead ground in oil, 2 parts Japan dryer, 1 part rubbing varnish and e...

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