MIG29 DECALS

I’m working on decaling my Revell 1/32 Fulcrum. I’m using the Cutting Edge Farewell Fulcrum sheet. The decals come with black masking guides. I’m not sure what they are for or how to use them. Can someone help me out?

Many thanks

Neil

bable,

Best way to get some help on that one is to provide a pic or two.

Tank