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Resist for etching with ferric chloride

Can you please recommend what I could use as a resist to protect the side and back of my aluminum plate as I am using ferric chloride ⇦ this on eBay or Amazon [affil links] to etch a house number into the plate. I am using a vinyl decal as my resist for the top.
regards

Shafique Saleemi
SIGNshop - Surrey, BC, CANADA
2007

Paint, adhesive tape or plastisol are some options.

Guillermo Marrufo
Monterrey, NL, Mexico
2007

Plating as resist for ferric chloride ⇦ this on eBay or Amazon [affil links] ? What metal would be suitable for plating copper laminate in order to prevent etching by ferric chloride solution?

malcolm mill
hobbyist - heskin, lancashire, U.K.
October 28, 2008

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