Birchwood Casey Perma Blue 3oz liquid - Genuine Birchwood Casey product - for touching up or reblueing of most guns - fast acting non streaky uniform finish - NOT suitable for stainless steel, aluminium or non-ferrous metals - 3 fl.oz (90ml) - Full MSDS available upon request - care must be taken when applying - please use in a well ventilated area and observe safety and handling procedures - WE DO NOT ACCEPT LIABILITY for any damage or injury to equipment or persons caused by using this product - We ship this item to mainland UK ONLY. We will not ship this outside of Mainland UK - We are unable to ship to the following postcode areas : BT / GY / HS / JE / IM / IV1-IV28 / IV30-IV32 / IV41-IV49 / IV51/ IV55 / IV56 / KA27-KA28 / KW15-KW17 / PA20 / PA41 - PA49 / PA60 - PA78 / PH42-PH44 / ZEFAQs on usage: Q: Why is the Perma Blue not taking to the metal?A: The chemical will not take to a metal that is not 100% steel. To confirm if you metal is steel place a magnet directly onto the metal. If the magnet does not stick the material it is not steel. Another reason is that it is not fully cleaned. For the best results use Birchwood Casey Cleaner-Degreaser (available separately).Q: How many coats of Perma Blue should I apply before it will not get any darker or better?A: After 3-4 coats the metal will not get any darker or betterQ: How do I apply Perma Blue?A: Apply chemical cold using cotton swabs, synthetic brush or sponge