Flat Decals...Round Surface

Any tips or tricks on getting decals to look good on a rounded surface without wrinkles or air bubbles? In particular, on 30’s thru 50’s fat round flared fendor cars/trucks?

Use a good decal solvent… This “should” soften the decals enough to get them to conform to most curves.

I have a few clues and tips here: http://www.naplak.com/modeling/tips/decaling.htm

Thanks naplak!!