REPAIRING SERIOUS DAMAGE WITH THE MAINTENANCE KIT (FOR TECHNICIANS)
Clean accurately the damaged surface and the surrounding parts with a cotton cloth and methylated spirits. Dust and stains shall be removed.
Using a stainless steel spatula or putty knife, mix accurately the filler/putty provided with the catalyst, up to a complete dispersion of the liquid substance. N.B. Use thoroughly both components; in case of wrong proportions of catalyst, the risk is to get a yellow colour finish (too much catalyst) or not enough hardening (not enough catalyst).
Apply the filler/putty on the damaged part and close around it. The filler/putty should be applied a few at a time inside the flaw, preventing air from going out. The result to get is a putty surface in relief, on the damaged part and close around it.
Let the filler/putty harden for at least 12 hours at an ambient temperature, that should be at minimum 15°C to get good results. The use of a warm air generator (hairdryer) would help speed catalysis activation and get a faster hardening process. In this case, after complete catalysis of the filler/putty, 4-5 hours are enough to remove it.
The filler/putty is to be removed by 220 grain glass-paper. In case of big excess of applied filler/putty, it is recommended to use a rubbing machine, priming with a 120 grain glass-paper and finishing with a 220 grain glass-paper. The surface should be rubbed down and smoothed evenly, including also the parts around the defect in order to eliminate any non-homogeneous part, especially sinking or hollow effect.
After filler/putty removal, eliminate the consequent dust and start cleansing using common detergents and the Scotch Brite® sponge included in the maintenance kit.