as I wrote in another forum, Curtiss had it own specifications;
export finish specifications
- S-516,
- S - 517: finish of export airplane
army finish specifications
- S - 615: finish of p36 airplanes and P40 airplanes
on factory drawings of H75 A1 to A9 fuselage, the specified finish is Curtiss S-517
for the P36 it's the S-615
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
what each finish specification indicates:
S-517
1.1 this specification covers the requirements for finishing Export airplanes. Items marked thus (**) must be covered specifically on each contract.
......
5.
DETAIL REQUIREMENTS:
5.52 Interior Metal Parts and Surfaces: the finish for interior(unexposed) parts and surfaces (wings, fuselage, control surfaces) shall consist of one of the following schemes,
unless a specific scheme is specified in the contract.
- 5.521 All alclad 24ST used as skin covering for wing, fuselage, tail surfaces, and other parts fabricated in the heat treated conditions
to be coated both sides with blue Lionoil shop coating, or equivalent, prior to fabrication and assembly. After assembly all Lionoil exposed on exterior to be removed to leave natural alclad as the exterior finish.
Lionoil to be left on the interior.
.........
- 5.525 The interior of the entire fuselage, and parts enclosed therein to be given one coat of the following mixture to produce uniform and satisfactory appearance:
COCKPIT COATING FORMULA
One gallon zinc chromate primer
one-tenth gallon black enamel
Two gallon of Toluol
4 ounces aluminium paste
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
below: fuselage H75 A3 N°2xx. starboard side between frame 1 & 3, we can see the yellow green sprayed over the Prussian Blue Lionoil as specified by Curtiss S-517/5.525
H75A2 n° 151, windshield frame & fuselage door
the clamp on the frame is for the bowden cable of jettisonable canopy release
the french Hawk were delivered in natural metal finish, blue Lionoil was removed from exterior surfaces before delivery.
Sometime the area of fuselage under the rear window was unpainted when camouflage paint was applied,
it remains NMF in this case.
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
army finish specifications
S - 615
**C-1c. Yellow green finish. the yellow green finish coating specified for general interior finish shall be prepared as follows:--
Zinc chromate primer 1.0 Gallon
Enamel, black 0.1 Gallon
Aluminium paste 4.0 ounces
Toluol 2.0 Gallon
......
**
E-10 Finish for interior parts and surfaces.
**E-10a. The finish for interior parts and surfaces shall be as follows: --A greater number of coat of primer or finish may be added at the discretion of the manufacturer;
**E-10b. Wings, control surfaces, engine mount and fuselage, excepting compartment for personnel and luggage.
**E-10b (1). One thin coat of metal primer and one coat of yellow green finish before assembly and one coat of yellow green finish after assembly.
**E-10c. Cockpits. Cockpits shall be finished with one coat of primer and one coat of yellow green finish before assembly and one coat of yellow green finish after assembly.
**E-10d. Omitted(Passenger Compartments);
**E-10e. Cargo and Luggage compartments.These compartments shall be finished with one coat of primer and one coat of yellow green finish before assembly and one coat of yellow green finish after assembly.
from 1943, curtiss prescribes that the yellow green must be tinted to matches the interior green 611
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
As you see, the cockpit interior surface was yellow-green unless that specified in the contract of customer.
If the finish type seems knew for the french hawk, it is unknow for other customer