Plasma Repeater representation?

[Laughingman]

Working on a fully magnetized dark angels  legion support squad, have them set up with flamers but interested in having an alternative  Plasma gun/Plasma repeater setup. My first attempt was less then successful, using a Shapeways "Plasma reaper shotgun" from  white wyvern designs, which lacked detail/smoothness when primed (I had previously scrubbed them down in soapy water, it was not enough alas stripping them resulted in some sort of chemical leeching effect them left a bizarre white film, my attempts to get off have been less the successful. 

 

Any ideas on how to represent the plasma repeaters? The people I game with are rule of cool type people so it does not necessary have to be GW/Forgeworld product (state side in my experience outside of GW stores and events, rule of cool is law)

Edited February 21, 2018 by Laughingman