Project, metal framed Crittall windows on exterior of church built in 1940, never galvanised but painted in a lead based paint. What product would you recommend to paint over the existing paint with minimal disturbance to surface. Do you have some sort of lead encapsulating paint we can use over the lead based substrates ?
Assuming the previously applied lead paint is clean, dry, sound and prepared as detailed in the technical data sheet we can recommend Zinsser Bulls Eye 1-2-3 followed by 2 coats of Zinsser AllCoat Exterior (Water Based).
We would recommend testing for compatibility and adhesion on a small area prior to full application.
This is available in many RAL and BS colours in a matt, satin or gloss finish.