In the April Model Rail, the Q&A column contains some advice on a partial repaint of a Lima 47. The answer says to rubdown, degrease and prepare the surface properly before applying the new colour.
Pardon my ignorance, and all that, but what does "rubdown" actually mean? And would you be able to prepare the surface without spoiling the adjacent colours?
On a related point, if I attempted a partial painting of the warning panel yellow on Lima diesels, would any preparation be necessary, since there's no actual overpainting? And what about underframe weathering, which again would be paint applied to bare plastic.
Thanks for any advice.
Regards,
Stuart.