Scrapping a cat mash with screw driver?? Lolz this is something new. Why don't u just pass through that screw driver into that mash? How about deep pores clogging in between those mash? Do you think it ll clean in that way? By scraping you are not removing rust but damaging it's outer pores which you feel removing rust. It's worst way to destroy your catalytic system.
If anyone in Karachi want to clean and service their catalytic converter without breaking and damaging it can bring their car to us. INSHALLAH we ll show you remarkable and viable results in your car not only visibly but in performance too. In the result the car ll flow out exhaust gas frequently, no sign of any oil or gasoline smoke but only steam or water dropping. This what we consider should give result in the end.
For details contact.
0314-2042309
Regards,
Farrukh
Newtech Autos Karachi.