There seem to be 2 version from ProHunter, "Single Red" and "Double Red".
http://www.discoverprohunter.com/collection/DeepSea/
The "Single Red" looks like these version, with correct coloured marking and a steel helium valve....
It is indeed more rought, I bought two of them lately and on both it was that way! But no soooo obvious, as the swanneck is above that part!!!
BTW: It s not as bad as in you picture!!!
Well, I tried it to a Vinatge-PAM but it might work for RLX aswell. I put mine into the microwave for 30-60 sec and later pit it for 4 minutes below the grill in that microwave! Now it looks real nice and aged.... but not damaged!