That BT-42 -tank which we have here in Parola Armour Museum has been painted just basic Finnish army dark green. Paint has only been faded during the years, because the tank has been on the outdoor area since 1961. Those BT-42 -tanks used by the Finns were never painted gray. In the picture it might look like that it is grey but it is in faded Finnish army green colour.
That BT-42 toy which is taken of that japanese animated series where this tank is shown is grey. That colour is a chosen by the animators. Colour of that tank is not the same as the colour of the original tank which we have here in Parola.
Finnish BT-42 -tanks were at first painted in just Finnish dark green colour. Later when the three colour camouflage scheme were taken in use they were painted with that. Three colour camouflage scheme contained grey, sand brown and moss green colours. That colour scheme were taken in use starting April 1943. Those BT-42 tanks which took part on battles in summer of 1944 were all painted with that three colour camouflage scheme.