I’ve done a little coloring in photoshop but really prefer Marshall’s oils and oil based pencils on a toned silver print. The problem is there aren’t many fiber papers now with the right tooth to take the oils. I grew up using Ektalure G and X for a rougher texture and found several other papers in the 60’s that were beautiful warm slightly textured portrait papers that took oils and pencils perfectly. Dupont made my favorite papers in the 60’s, Varilour was my favorite. Ansco made Indigo which was great too. There were a few others that were cheap papers distributed by Spiratone and a couple other companies that were excellent too.
Linhof MT + Nikkor W 150/5.6 + Tri-X
No more hand-coloring with Dr. Martin's inks.
Today I do it with a Wacom Tablet + Pen & Photoshop.
510 Pyro developing.
Fortunately I still have a supply of Forte Poly Warntone plus matte surface that when toned is stunning and takes oils very well. But Forte is long gone and when this it gone it’s gone. I understand the secret to Forte PWT + was Cadmium which is highly toxic.