I have used the 4007 hardener in the UV clear with good results....Mixing ratio is about 5-6 drops to 3-4oz.. It mixes a little cloudy but drys clear.. It helps the UV stiffen and not as soft as it is on it own..
Hope this helps! Raven/2001
------------------ Raven/2000 Airbrushed by Raven Lower sackville N.S. deveausdiscovery@sprint.ca