1) can we apply RAD again on the Behr cleaned wood?
2) will the cleaner and brightener damage the composite deck and the aluminum deck railing with glass insert?
3) what is the best way/method to clean the top of the pergola?
4) which way is easier/better to stain the pergola, brush or spray ?
5) should we sand the cedar before cleaning?
6) I read somewhere it says if the wood was not stained after cleaning for longer than 14 days, then it needs to repeat the cleaning and brightening process again, is that true?
Attached is a picture of the pergola and shutters, it has been raining since last night so the wood is wet and doesn't appear grey but it is grey when dried. Thank you so much for your help!