when using dulux weathershield u/c and gloss is it ok to spot prime bare surfaces with normal oil based wood primer or use thinned u/c by 30% or do u have to use weathershield primer 
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spot priming exterior windows
- Thread starter ando
- Start date
The undercoat is a primer undercoat. The thin liquid preservative primer is meant for bare wood only and should be wiped off any that gets onto existing paint, I tend to not bother spot priming with the preservative and just spot prime bare wood with the weathershield undercoat. (thinned a little)
thanks mate will use thinned u/c
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