American paints, lacquers, pigments etc were included in lend-lease shipments. but, official documents list small amounts of paints in Lend-lease shipments:
in protocols and shipments lists at
http://lend-lease.airforce.ru/documents/files/Part_1_pages_13-28.pdfthere is only
Lacquer Bakelite 11,200 lbs
Lacquer Black 56,000 lbs
there is a list of material shipped to USSR at
http://whatreallyhappened.com/WRHARTICLES/pearl/www.geocities.com/Pentagon/6315/lend.html "From Major Jordan' Diaries" doesn't sound official
looks like a chapter from a book
Kalsomine o.c.w. paints, dry 34,236 lbs. $11,786.
Lacquers, nitrocell clear 13,598 lbs. $27,050.
Lacquers, nitrocell pigmented 2,276 lbs. $3,335.
...
Paints, bitimious liquid plastic -- $188,2?4.
Paints, colors, paste, oil, n.e.s. 2,341,892 lbs. $279,679.
Paints, etc., ready mixed, n.e.s. 176,211 gal. $298,321.
...
Chemical pigments, n.e.s 92,583 lbs. $34,817.
...
Chrome pigments 51,426 lbs. $11,746.
MlSCELLANEOUS FOR 1945 ONLY
Paint spraying equipment & parts 938.
...
Ready mixed paints, stains, enamels 28,622 gal.
Pigments, chrome l0% chrome 9,374 lbs.
Pigments, chemical, n.e.s. 12,022 lbs.
Paint, colors, paste oil, n.e.s. 668,409 lbs.
Water paints, dry 22,400 lbs.
Laequers, nitrocell pigmented 4,650 gals.
IMHO, quantities for nitro-cellulose lacquers, which would be important for Soviet aviation industry are small. Some of the numbers in this list are substantial, 1,000 tonnes of n.e.s. paint (n.e.s. means "not especially specified")
those are not necessarily aviation paints - could be paints for ships, industrial plants etc.
I would say that Soviets received significant amounts of chemicals used in paint production (like 3,300,000 lbs of acetone) and some pigments. In the end, VVS planes were painted with Soviet made paints in shades requested by VVS and NKAP.
Regards,
KL