Antiseptic wood brush a few anti-corrosion paint
If you want to get more excellent anti-dirty effect, if necessary, then do two dedicated outdoor varnish treatment.
Surface protection paint or oil-based paint after brushing (only once) in order to achieve the best results, within 48 hours to avoid moving or moving heavy objects, so as not to damage the preservative wood surface has formed a protective film.
Because the anti-corrosion wood itself is a semi-finished products, rough parts in the shop after the wood moisture content dropped to below 20%, and then sanding again, if you want to have better results, clean the surface can also be painted outdoor protective coating The color of the protective paint should be fully stirred).