Starship Modeler Discussion Forums

I agree with the others, but you could try http://www.reapermini.com/powerpalette

It'll only give you reaper colours, but there are conversion tables out there to other manufacturers

Something I saw recommended but haven't yet tried is finishing strips for dental work - Amazon UK link

Have you looked at chipping solutions from the likes of AK and MIG?

They're meant to replace the hairspray in the "hairspray technique", but may work instead of salt.

I wrote a scale calculator last year, that might be of use

http://scalecalculator.appspot.com/scalecalc

It will also do conversions between scales.