Used this on some resin bases and for my 7TV crews.

Cobbles

Paint the cobbles in random, choosing the colours below.

1. Base Khorne Red
2. Base Mournfang Brown
3. Base Mechanicus Standard Grey
4. In between the cobbles Dryad Bark

Yellow Lines

1. Base Yriel Yellow

Kerb

1. Base Administratum Grey

Slabs

1. Base Grey Green

Final Touches

1. Wash Nuln Oil over the whole base
2. Drybrush Zandri Dust