BR60103

I picked up the trick of using a pointed skewer to pull the glad hand over from the side.  This is very useful where there are coaches with corridor connections above the couplings.

I use pens from Faber Castell and Prismacolour. They have a good range but I sometimes feel I should buy a new colour for each building.

I colour the edges of window and door openings from the inside in case of slips. For corners I fold them right back and run the pen down sideways, but sometimes have to run it in the groove.

I sometimes am able to do bricked corners and leave a gap at the mortar courses.

(I am working in OO.)

My experience is that it isn't a sticky glue but needs something to grip or a hole to grab in. (My dentist uses its cousin in fillings.). Or to fill a slightly oversized hole.

It does have the feature that it doesn't go off with time so you can fiddle away getting the parts set right. It would help to have a third hand to shine the light.