I'm shocked ..... used them for well in excess of a decade, maybe more and only ever had one problem with them ... opened a 20 of HBZP grey oxide, stirred it with the stirrer in the drill and was like water. Opened another .. same problem .. rang them and we had two replacements the following morning ... rep turned up a couple of days later full of apologies ... they'd had a duff batch that'd been wrongly mixed/missing pigments, etc. and we weren't alone - 1000 ltr batch, most of which had gone out ... anyways .. he left us four more 20L tubs and took the faulties with him .... and that's the only issue I ever had with them ... Trying to recall the carriers they used - blue and yellow 18t, 4 wheelers ... they were always pretty good too