Coverings, Finishes, Wood

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Across
  1. 1. restore dope coating
  2. 3. routed for weight reduction
  3. 8. plywood skin patches
  4. 10. no external bracing
  5. 11. french fell seam
  6. 13. dope proofing
  7. 14. reflected by aluminum pigment
  8. 15. over stressed failure
  9. 16. phosphoric acid
  10. 19. strength classification
  11. 20. adverse humidity, drafts, temp change
Down
  1. 1. slows
  2. 2. chemical resistant top coat
  3. 4. stitch for two legs
  4. 5. socks on carpet
  5. 6. any form or amount not permitted
  6. 7. for added wear resistance
  7. 9. removes grease
  8. 12. unhydrated wash primer
  9. 17. too much
  10. 18. unaffected by chemicals and moisture