<P> There are also methods of cold bluing , which do not require heat . Commercial products are widely sold in small bottles for cold bluing firearms , and these products are primarily used by individual gun owners for implementing small touch - ups to a gun 's finish , to prevent a small scratch from becoming a major source of rust on a gun over time . At least one of the cold bluing solutions contains selenium dioxide , to accomplish the bluing . Cold bluing is not particularly resistant to holster wear , nor does it provide a large degree of rust resistance . It does , however , often provide an adequate cosmetic touch - up of a gun 's finish when applied and additionally oiled on a regular basis , however , rust bluing small areas will often match and blend better and wear better than any cold bluing process . </P>
<P> There are also methods of cold bluing , which do not require heat . Commercial products are widely sold in small bottles for cold bluing firearms , and these products are primarily used by individual gun owners for implementing small touch - ups to a gun 's finish , to prevent a small scratch from becoming a major source of rust on a gun over time . At least one of the cold bluing solutions contains selenium dioxide , to accomplish the bluing . Cold bluing is not particularly resistant to holster wear , nor does it provide a large degree of rust resistance . It does , however , often provide an adequate cosmetic touch - up of a gun 's finish when applied and additionally oiled on a regular basis , however , rust bluing small areas will often match and blend better and wear better than any cold bluing process . </P>
when should a cold blue finish be applied on a rifle
when should a cold blue finish be applied on a rifle
for implementing small touch - ups to a gun 's finish , to prevent a small scratch from becoming a major source of rust on a gun over time
for implementing small touch - ups to a gun 's finish , to prevent a small scratch from becoming a major source of rust on a gun over time