i dont understand... what else are you expecting to paint other than the mesh? if you are trying to paint a model, then you have to use the recursive parameter in the PaintEntity() to paint the child mesh...
require("Scripts/constants/engine_const")
RegisterAbstractPath("")
Graphics(800,600)
fw=CreateFramework()
fw.main.camera:SetPosition(Vec3(.5,1,-3))
drum1 = LoadModel("abstract::oildrum.gmf")
drum1:SetMass(0)
drum1:SetColor(Vec4(1,0,0,1),1)
drum2 = LoadModel("abstract::oildrum.gmf")
drum2:SetMass(0)
drum2:SetColor(Vec4(0,1,0,1),1)
drum2:SetPosition(Vec3(1,0,0))
while KeyHit(KEY_ESCAPE)==0 do
fw:Update()
fw:Render()
Flip(1)
end