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- Scrape surface sap, clean area with a naptha soaked rag, scuff with 120 grit, dust and spot prime with shellac.
Zinnser makes a great product called BIN. Use shellac only as a spot primer and top-coat within 2 days as it won't hold up w/ moisture and UV rays. Clean up shellac with denatured alcohol (or any clean alcohol). It dries in 15 minutes but can be re-dissolved with alcohol forever.
All products available at local hardware or paint store. Leftover Den-alcahol usefull for cleaning up dried latex paint, naptha is an excellent surface prep solvent/de-greaser; evaporates in less than a minute with NO residue. Chemically it is nearly identical to mineral spirits but has less petroleum oil as it is distilled from same raw product but at a lower boiling temp.
Hope this helps.
Andrew
Bluewater Painting
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