ok i have put the car back together and its smoking, the problem is when you start it after its been parked up for a while or left to cool down if you drive the car the smoke clears but when sat at the lights and stopped when you go back on the throttle to pull away it smokes again just a puff then nothink it doesn't always do it. there is no smoke on boost or when you let off the gas, i have done a compression test and cold its 6 bar and when warm its 8 bar, i have checked all the group a breather system and this is clear the inlet and head and every think was chemically cleaned i have had new bronze valve guides fitted along with new stem seals and had the valves re cut new mountune multi layer gasket arp nut and stud kit all new gaskets for top end. is this head gasket re useable ?

if you leave the car parked up for a bit and pull the plugs out you can see a small amount of oil in the bowls of the pistons all 4 i will be investigating it tomorrow with a bore scope but any help would be great