I had a call from a cleaning supplier and discussed this with them, i explained that i use mostly Prochem stuff as i was sent a lot of testers when i passed my NCCA and that this was a good way of trying new stuff without the risk of spending a lot on something that is not very good, he has emailed me today saying he is going to send me some "Craftex catalyst" free of charge, anyone used this ? i will give it a go