If it is black it will be an interesting change from green, although I have to say I loved the sight of 34027 when it was painted in BR maroon for the commencement of the Harry Potter story. As an aside I once saw a print of a painting featuring four express passenger steam locos lined up outside a shed, all painted BR maroon. I think they were possibly a duchess, a King or Castle, a Bulleid pacific and maybe an A3 or A4. Anyone else recall this ?
Back to 35018, perhaps there is black paint left over from 45699 ?