Stripes. Lots of yellow stripes
Welcome to the club. I do NH pre-McGinnis loco schemes.

The DL109 needs the stripes chopped up to fit between handrails and vents. Plus the stripe where the roof meets wall and soooooo easy to wear off by handling the loco. And hey, how about the orange and green PA scheme with lotsa lotsa tiny silver stripes down the sides? Each. Placed. Separately.
I have one more of each to paint and decal. Someday.
And I thought my Pennsy passenger cars were a pain in the stripe.