Thanks caveteursus and Hans for your kind suggestions. But unfortunately neither "CoolAmp" nor "Liquid Tin" available in my country (Sri Lanka) :( Any other suggestions highly welcome. Anyway thanks again for your feedback.
--- In homebrew_pcbs@yahoogroups.com, <pcbhouse@...> wrote:
Anyone tried PCB Tin Plating with Tin Chloride, Thiourea and Sulfamic Acid? I just tried and I got only few tin spots . Any suggestions pls.