The next stage is a bit fiddly so attempt it if your feeling adventurous. Its not really necessary anyway unless your a sucker for small detail - like me
The weld seems are made from two part epoxy putty, the 'toothpaste' kind is impractical.
Small amounts are rolled out.
After placing in position an old large bristle brush is used to create the textur of the weld. Its simply rolled over the slither of putty.
Done! - If you wanted to, you could add more around th pipe and on top but you won't see them so there is little point.
Looks pretty cool behind the s2k front, just needs a little paint.
I'll post more pics when complete and will also extend the piping.