For the DBC line the reducers are DT860,DT870,DT885,DT895 and a retarder that's DT8110 I think-that's the cold weather to hot progression.I think the clears start with DCU but not positive,but the #s are 2042(fast),2021 and 2002.there's another something like 2082 or 2085 but it's extremely fast and only good for painting 1 panel,flash time between coats is pretty much 0.I like 2021,it flows and bakes nice but it will be a touch soft in 12 hours if it isn't baked.2042 is nice too and dries pretty quick but it'll solvent pop if you get a little heavy putting it on.2002 is pretty much an allover clear and dries slow.If you want to make the base colors more transparent like candy colors get some DBC500 blending clear.It's basically just clear basecoat like House of Kolor's intercoat clear and uses the same DT reducers as the clear and basecoat.You can mix the base 50/50 with it to blend out those colors that just don't want to cooperate or you can make candies or pearls by adding a little of them into the clear until you get the effect you want.Hope this helps.