Try Mr.Foong (0122097623 / 0377817476) of Veng Cheong Auto. They are located near TopMark Dealershipm in Jln Tandang (Jln 222 area). It looks like a typical chinaman workshop, not very tidy but I must say, his workmanship is very good. My family has been sending our cars to him whenever one of our cars has been scratched or knocked.
He has 20yrs plus experience and his workshop is there since the 80s. He has an eye for body panels and paint. Just one look, he can tell if you had your door resprayed or your c pillar section has been fixed before, etc.... At any one time, you can see Ferrari's, Porsche's, Rang Rovers, Bimmers, Mercs. Maserati's, various Classic/Vintage Cars and there was once I saw an Australian made Holden COmmodore HSV with V8engine in bright orange.
Check them out, talk to them, Mr.Foong (the boss) he can speak relatively good english, but the rest of his employees don't speak english well....so just bahasa pasar or whatever you can converse in and go with the flow. His senior apprentice (which is a very experience guy - Ah Sin) is a very nice and down to earth humble guy, talk to him in canto/bahasa and he will share his thoughts with you on your car. After talking to them and seeing their work, if you are not satisfied/convinced, its ok, but if you are, then rest assuared, they will do a great job. Godd Luck in your quest then...