First we remove all the rust from the steel: using grinders, sanders and wire brushes. This all depends on how bad the rust is. We then patch prime the repaired sections, then if specified, a full coat of primer to reach the required DFT.
We also do tests every 2 hours to make shore we are within the spec:
Relative Humidity | Air Temperature | Surface Temperature | Dew Point Temperature
This is carried out using a Positector DPM: All the readings are then recorded for our records we also provide a copy for the client.