Refinishing Nitro over Poly - questions

[Twigman]

I have a bright yellow precision that I built a few years ago.

It was a finished Warmoth body in Grafitti Yellow Poly.

I don't like the colour.

I am planning to refinish with black nitro over the yellow poly.

I plan to sand the yellow but not all the way off, perhaps with 400grit just to key the surface for the nitro paint.

Will this be enough or should I really strip all the yellow back to wood?

I don't really want to have to then fill and sand so would prefer just to leave the yellow on.

I plan to airbrush the black nitro on.

A couple of questions:

1  How dilute (xparts paint to xparts thinner) would be best?

2  What volume of paint is required to cover a precision body? Diluted or Undiluted?  - I ask this to establish whether my current (modelling) airbrush would have sufficient capacity in its resevoir without having to refill it too frequently.

 

I know these are proper newb questions but we all have to start somewhere.

Edited Thursday at 11:24 by Twigman

[fretmeister]

Strip it with a heat gun.

[BlueMoon]

11 hours ago, fretmeister said:

Strip it with a heat gun.

This ^^^^^^
 

………or first a binding coat of shellac over the prepared (sanded) poly. Nitro over shellac is fine.

 

Your modelling airbrush reservoir is likely too small. Repeatedly refilling it during the job could create issues that you don’t need.

 

Good luck.