Jules, scribing putty isnt a problem.
Did ALOT of it on the Sabre.
Just have to remember to go lightly with the pressure, otherwise it tends to 'chunk' out of the line, leaving a ragged crusty looking edge.
Darren I use the Viponds Iso, it comes in a 1 litre container.
The one next to it is the only retarder I could find that worked with acrylic paints through my airbrush.
Took 4 months, and around $180 worth of retarders being bought and ditched, but finally found a winner!!!!
And yes, I tried the Irish whiskey, but couldn't stop spraying it into my mouth!!!
Maybe I should try mixing it with some Kiwi and Lime, whatcha reckon Tom