I guess most modellers (especially the more experienced ones) have their "own way" of doing the things needed to paint and weather the model. In my opinion, overspraying with buff to blend the colors is pretty much the same as doing some filters with a light buff color, as the effect is pretty much the same (maybe the paint gets somewhat lighter with the overspray). On the other hand, filters are much easiert to control and you can easily un-do any filter by simply adding another filter with the shade of another color until the result is what you want.
This is the order I do my models:
- basic painting + post shading (I highlight the exposed surfaces with a slightly lighter color)
- satin varnish
- applying decals
- matt varnish (to seal the decals; filters seem better to work on matt surfaces)
- filters (mostly 4-5 coats, until the color looks right)
- fading with oils (to add some variety to the painting)
- satin varnish (to seal the filters and to prepare the surface for the washing, although I don't do this always)
- chipping and running rust effects
- matt varnish (only when satin varnish was applied before)
- dirt, dust and rainmarks, oil stains, etc.
Just my way, guess there are tons of other ways to achieve a nice result!
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