Painted surfaces that need an insulation primer (soot, nicotine, water damages)
Wash the surfaces with RENSA SUPER Paint cleaner. Remove all loose paint. Matt down hard or gloss surfaces by sanding and thereafter remove the dust.
Prime 1 x with TIMANTTI STOP Insulation primer. Fill the damaged areas with SILORA LW Filler. Sand the filled areas and spot paint 1 x with TIMANTTI 3 Primer. Finish 1 x with BIORA CLEAN.