If you are near Malacca, i recommend

TAI CHONG STEEL SOLUTION SDN BHD
PT1631, Jalan IKS PS 11,
Kawasan Perindustrian Ringan, Pulau Sebang,
78000 Alor Gajah, Melaka.

MR. WILLIE HO (H/P: 012-658 6321)

My company engage them for several custom stainless steel works (cat ladders, hand railing, etc)
Not bad service, the young boss is pretty friendly

my other sub-con simply just weld it and leave it as it is
this guy bring low concentration acid to wash it to make it more nice
it's not necessary, but a nice added service