that metal polish would ruin your barrel...
edgi barrel is made up of brass... awoooooo... metal polish eats brass little by little
ginagawa ko lang yung post ko... just make sure walang maiwang dumi sa barrel use a very good LED light para malaman... i always clean my barrel after every gameday...
and i use cotton buds dipped in silicon spray oil (delta SO) to swab and massage the hop up bucking lips and the part where the BB makes contact.. i just turn on the hop up into half setting for this
and never ever ever use metal polish!!! for very stubborn dumi na yan dapat gamitin..
BTW.. im using an EDGI 6.03mm inner diameter 500mm length tightbore barrel..