Well the ones on the right, BDS DubCons 100a duro which have yellowed slightly, nothing a bit of Rit Dye won't improve.
The BDS Shogos on the left were bought on behalf of Gra.
Then today these turned up...
Rainskates Stingers 100a (that magic duro) Single Conical version.
Anthony gave them a blast with the sandblaster and removed the tatty graphics for me, ocd happy now.
Might dye these too.