I am making my first attempt at using a wash to accent the panel lines on a model aircraft but it hasn't been completely successful.
I painted the model mostly using Tamiya spray cans with a few small parts brush painted using Tamiya acrylic. I left that to dry for a few days then coated that (using a brush) with "Pledge One Go". This is a floor polish made by SC Johnson which "Fine Scale Modeler" magazine says is an alternative to Future in Australia. That worked quite well except it caused some of the acrylic paint (flat black) to run a little.
I then applied a wash of oil paint thinned with an odourless solvent. I cleaned off the excess and left it to dry for about a week. Again that worked quite well.
The problem came when I brushed on a second coat of the polish. It made the oil paint run and rinsed most of it from the panel lines.
Can you say what I did wrong? Would it work better if I bought an airbrush and used it to spray the polish? Is there a fool proof way of doing this?