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This is a good product to use to cold blue, but best if you strip the old blue and rust and prep the area to be blued. Once done, heat up the metal and then get a applicator or cotton ball and dab the perma blue on it. It will turn grayish white, and hot and apply again for a darker blue finish. Then the next step is to apply some gun oil to clean up the residue and you're done just let is cool done on it own. its that simple. I used it to refinish a recrowned barrel on a MN 91/30 rifle. The finished product looks like it came from the arsenal that way.
Verified purchase: Yes | Condition: New
Shipping was fast and used the product to update/restored a WW-11 Mauser Rifle. The material works very good if you take your time sanding down with 500/1000 grit wet sandpaper and 00 steel wool with many coats that are needed, have cleaned the rifle from all grease and used brake cleaner in spray can, done it on a dry day with many coats 15 min. to 1/2 hour intervals and left in the sun / in the end put Hoppes lubricating oil on it. No pictures since my camera was recently stolen out of the car/ advice always lock up your car no matter where, i learned it the hard way.
Verified purchase: Yes | Condition: New
Several of my hunting guns had lost the blue on the sights and Perma Blue came through, covering up the lost blue easily. No more shiny sights and it is very easy to use. Jim
Verified purchase: Yes | Condition: New
Works great but can blue even better with the part warmed up some. When I first got this Perma Blue, I tested it on some scrap metal and it was very adequate for turning the metal black(ish). However, Tested it on another scrap but heated the metal up with a heat gun before applying the liquid and, the difference was huge. I then set out to blue a few old gun parts, using the pre-heat method and those parts look like brand new.
Verified purchase: Yes | Condition: New
Made a rusted old shotgun barrel look very proper without over restoring it. Of course care in preparation is everything. One needs very little to produce the right patina. This little jar will last me a long time. Good for spot repairs as well.
Verified purchase: Yes | Condition: New