As it is a scale model, have a look at the full size sections. from the website
The Incomplete Guide to Airfoil Usage
http://m-selig.ae.illinois.edu/ads/aircraft.html


Grumman G-50 F6F Hellcat root NACA 23015.6 tip NACA 23009
Why not go with those sections? And add 2 degrees washout for safe handling. I have no idea if the full size had washout. Check your scale drawing, and if it did add an extra one degree.
BTW, the NACA 5 digit series have a lower pitching moment than the 4 digit series which reduces the download needed on the tail. If the scale tail size is small that might matter.

Full size aircraft like these always have sections that taper in thickness like this. A model with a similar tapered thickness will look better. Just be sure not to give the tip a sharp leading edge: round off the LE radius.