Hi,  any top tips for repairing pin holes in my DT400 silencer?  It’s all a bit thin so I think welding is out, but brazing maybe? Or are these epoxy putties any good?  There’s a few pin holes near the Union with the exhaust, I’d like to do the best job possible as they’re like unicorn poo here in the UK!  Advice much appreciated.

Two years ago I used some dark gray exhaust epoxy which seemed great at the time.  Sealed very well and held up nicely.  Even paintable.

Before responding to you post how great the stuff was, I went out to check the repairs.  Two of them fell off when I barely touched them today.  The largest patch is still holding though.

I would not recommend the epoxy patch as a long term repair.

Welding is gonna be the best way to go. Cheapest, fastest, and strongest in the long run. Any decent welding shop can weld thin stuff, especially if it's just pin holes. If you sand down to bare metal and clean it good, you'll probably get it done for less $ because they don't have to prep.

I had pin holes repaired by a welder. Not sure what type of welding he used, but here are some photos showing the repairs. I end up smoothing them ever so lightly with a dremel. Basically just took the very tip off each spot. There was no hiding the repair, but once installed, the heat shield and the seat did a good job hiding them.
  

Thanks guys, looks like I need to find a welder. Appreciate the advice.