Birchwood & Casey Presto Gun Blue Pen
The fastest and easiest way to touch-up nicks and scratches is with a simple-to-use PRESTO Gun Blue Pen! Penetrates hard steel instantly and gives a durable blue black finish that won't rub off. Use like a marking pe for one-coat coverage on non-stainless steels. No spill or drip - simply rub on with bullet-point felt tip!
NOTE: PRESTO Gun Blue Pen will not blue stainless steel, aluminium or non-ferrous metals.