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Specifications for Painting Exterior Surfaces 

 

 I. Exterior Paint and Coating System

 

A.     Shall be commercially sandblasted to SSPC-SP6 before painting unless otherwise specified by customer. Use #30 grit sand approved for outdoor blasting. Desired surface profile is 2 mils. 

B.     After preparation surfaces must be sound, dry and free of oil, grease, dirt, mildew, release agents, curing compounds, loose or flaking paint and other foreign substances. Any dust or dirt that has accumulated on surfaces between coatings should be removed before applying a new coat. 

C.    Exterior shall be primed with Bar-Rust 235 Epoxy Primer or other primer as specified by customer. Coating thickness shall be in accordance with

       Coating Manufacture’s or the customer’s standard. 

D.    Drying time and Recoat windows are to be observed. Exceeding the

       maximum time for recoat will require additional surface roughening of the

       underlying layer to prevent delamination of the new coat.  

E.     Intermediate Coat may be required per customer with coating type and  thickness specified. 

F.     Exterior shall be top-coated with Devthane 379 Urethane Finish (Navejo

Beige Standard; Other colors available per customer request).

  

Follow coating manufacture’s recommendations for mixing, thinning, application, film thickness and cleanup. Report any difficulties or deviations to the shop supervisor immediately.