Originally Posted by
Aldatroid
I use 80 grit emery cloth to clean the tubes outside and inside. Then some acetone right before brazing, using Cycle Design LFB flux and Sifbronze no 101.
So you would recommend that I clean up the joint and then build it up where needed etc?
Depends on what you want your joints to look like. Most want the smooth look, not the gobby one that is now what I see.
Reason i asked about prep, flux and cleaner is the amount of blackening in the flux. Could be from poor cleaning, too much heat or too long a heat cycle (or any combo). Andy