Automotive urethane ratios?

[Ferbz]

I recently learned how to use automotive acrylic urethanes for 1:1 projects, but would like to know what mixture ratios you guys are using for scale model work? For 1:1 projects, 3:1:1 or 4:1:1 is typical(3 or 4 parts paint to 1 part reducer and 1 part hardener). Do you use the same ratio for scale models or is it different? Thanks in advance!  

[Ace-Garageguy]

READ AND FOLLOW THE MATERIAL DATA SHEETS FOR THE PRODUCT YOU'RE USING.

Screwing around with hardener ratios will only lead to grief. After you've added the CORRECT, MEASURED amount of hardener, you MAY experiment with reducers to get a good consistancy to spray through your airbrush.

Use the manufacturer's recommended ratio of hardener / activator to paint...ALWAYS.

 

[BubbaBrown]

Ace is correct, but I do double the reducer and to date since 1985 no problem. that being said knock on wood

[Ferbz]

Thanks guys. I guess I should've been more specific: I wanted to know how much(if any) people reduce 3 part urethane paint down in order to get it to spray with an airbrush. Joseph, if you've had good results with doubling the reducer, I'll give that a try.