Artists oils from Hobby craft put on then taken off with thinner - I use white spirit but odourless thinners are also available if more expensive.
1. Underframe is airbrushed – wheel rims are previously blackened with a marker pen . Test First
2. Panels are next:
a. Mix brown, black and white oils on a palette (white gives slightly faded look)
b. Large ?5-7mm round brush to apply – looks crude but in common with many weathering techniques its about taking stuff off.
c. Paint corner panels, all angles etc. Looks very stark. Oil paint can be worked for a long time.
d. Rinse brush in thinners then downward movements to blend & remove paint
e. Take paper towel and wipe down to remove paint
f. Take a DRY brush and work down and in to nooks and crannies – have several dry brushes ready.
g. Keep working –flat brush – always vertical – streaks will fade. Sit in the angles.
h. Little circular motion with another dry brush to clean the centre of the panels and let original body colour show through – most paint has been removed.
3. Refining techniques such as dirt around rivets etc.
a. Stick with oil paints because of their working time and blending capability
b. Dab panel mix around rivet detail – small brush - the paint can be thinned more to make a wash
c. Gently work over with blending brush- apply and remove = dirt accumulation.
d. I've done a bit of (almost) dry brushing on the undeframes
e. A few powders have been dabbed around using a micro-brush.
4. Finishing - the mineral wagon has had a very light over spray of an enamel track colour mix, then the same mix then lightened to give a fading effect and the vans have been dulcoted
I've been inspired by the excellent work Neil Podbery has done in the GOG Youtubes. Worth a watch!
Chris H.