Engine tick

I have put a 4.25 stroke forged rotating assembly into a 30 over 454. When I received the block from the machine shop, they had painted the lifter valley with a grey graphite paint. ( they said this would aid in oil return). When I assembled the engine, I had trouble putting several of the lifters in the bores. Assuming the paint would quickly wear off shortly after initial fire up, I took no steps in cleaning the paint from t he bores. Unfortunately the engine is now complete and I have what appears to be a top end tick after 1500 RPM. In your experience, should I allow the engine to wear itself in or am I looking at a top end tear down to remove the paint from the bores?