He eventually found that blacking out the words with permanent marker proved more effective—but you can imagine how that looked.
Rise of the Man Purse|Isabel Wilkinson|October 13, 2011|DAILY BEAST
The dirt is, of course, to be carefully brushed off before applying the blacking.
Cooley's Cyclopdia of Practical Receipts and Collateral Information in the Arts, Manufactures, Professions, and Trades..., Sixth Edition, Volume I|Arnold Cooley
Behind him ran a fat butler, his face purple with fury beneath a large smear of blacking.
Just William|Richmal Crompton
A young knight of the brush stood near by, with his blacking box slung over his shoulder.
The Boy Broker|Frank A. Munsey
The captain, who was blacking his beard with soot and fat, having already darkened his eyebrows, gave a start.
The Missouri Outlaws|Gustave Aimard
The boot was very bad, but there was enough leather to carry some blacking, and the skin took the rest.
A Rough Shaking|George MacDonald
British Dictionary definitions for blacking
blacking
/ (ˈblækɪŋ) /
noun
any preparation, esp one containing lampblack, for giving a black finish to shoes, metals, etc