re: how to prepare deck originally stained with PorterDeck transparent wood stain
For best results it would be best to remove the previous coating with a stain stripped followed by a wood brightener. You would not need the cleaner. Both versions of TWP would work very well for a full sun deck in St. Louis.
how to prepare deck originally stained with PorterDeck transparent wood stain
Four years ago, we stained our new western cedar deck using PPG Deck Cleaner and Porter Paint\'s \"PorterDeck\" Cedar-colored transparent wood stain. We would like to use TWP to restain the deck this summer. What is your recommendation for preparing the deck before applying the TWP stain? Is it necessary to remove what\'s left of the previous stain by using Gemini Safe Strip or Solid Strip? If so, then apply Cleaner and Brightner? Which TWP stain product would you recommend (100 vs 1500?) We live in St. Louis, the deck is in full sun, plenty of humidity and high temperatures in summer. Thanks!
TWP Stain Comparison 
TWP 1500 Series 
TWP Staining Video 
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re: how to prepare deck originally stained with PorterDeck transparent wood stain
how to prepare deck originally stained with PorterDeck transparent wood stain