Maurice, If it were me, the warn holes I would either bore them out, and bush them back to size, or make enlarged pins. The Stuart engine I redid was very rough, and I cleaned it up quite a bit, then as I painted it, I rubbed it down with fine wet and dry paper between coats on the green parts of the engine, the black bits are satin black spray, from a can. There are quite a few bits I'm not too happy with, but the orrigional brief was just get it working, and when I did I suggested it would be hard to let it go, so the owner said "you look after it at your place", He only lives about 100m from my place. Ian S C