I purchased a farm which had lots of locus trees which needed to be felled. Out of those locus trees I decided to make a sign for our farm which was going to be seen from the road. I want to keep the original grain and everything. No paint, no stain but I need something to protect the wood from the elements. One thing that is already starting to happen is mold and that is only after 5 weeks or so of it being out.
I looked up boiled and raw linseed oil and found they were good for protection from elements but attracted mold. Already have that problem.
Did a bit of searching and found people saying acrylic waterborne would be good too.
Also saw enamel spray but couldnt see if it would protect the wood from mold or if there were any negatives to using it.
A friend recommended sparathane. Thoughts?
Ive used polyurethane before. Not good for outside use.
Someone else recommended copper coat but it seems that "Freshly applied COPPERCOAT dries to a rich copper brown. After immersion COPPERCOAT oxidizes to a dark, verdigris green color."
Looked at creocoat as well but it seems that creocoat inparts a dark color when it dries as well. Can anyone verify this?
What would be the best solution which wouldnt attract mold, last a reasonably long time, doesnt yellow from UV over time and helps to keep the wood from turning ash color?
Last edited by mystang89; 11-06-2017 at 06:27 AM.