I leave in NJ and installed a new deck using pressure treated wood. It is a bout 3 months old. I have filled the smalls holes with wood filler and lightly sanded the deck.
Looking to stain it now, was filling the holes and sanding create an issue for the stain? Do I still need to use Step 1 AND Step 2 to prep it.
Wood filler does not work on exterior wood and will not "stain" to blend with the AC or any semi-transparent deck stain. The filler will, unfortunately, stand out when done and will fail within a year after the Winter. As for the prep, yes, you need to use the kits. See this about new wood: https://www.armstrongclarkstain.com/new-decking-and-armstrong-clark-stain