It was the Swamp Ash that coloured up very dark very quickly, the crappie pine not so much.
I didn’t bother with a cotton ball, I just used a wad of T shirt material folded up a couple of times.
I have 4 kits with very thin veneer tops and I haven’t been game to start on them.
I am playing with solid bodies that I can sand back until I am confident enough to start on the veneer.
3 of them also have binding that is likely to be a problem with the strong dyes.