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Posted: 1/12/2011 12:45:04 PM EDT
| Why does Lauer say NOT to degrease after sanding/blasting? I wanted to degrease, sand, the degrease again but Lauer says the Duracoat will not adhere properly. Does this make any sense and why? |
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Quoted:
Why does Lauer say NOT to degrease after sanding/blasting? I wanted to degrease, sand, the degrease again but Lauer says the Duracoat will not adhere properly. Does this make any sense and why? Really don't no the reason why. Here are the steps i used with no problems. 1. Brake cleaner to strip all oil and grease 2. Sanded 3 Alcohol to make sure parts were clean. 4. Hang part don't touch and used duracoat Tru strip let it dry and started paint process. Think it's a bunch of bull you don't sand a car and not clean before paint |
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THEORETICALLY you get more surface (superficial) oxide formation if you clean with solvents after abrasive cleaning and allow those solvents to evaporate. You can even see this visually if you compare a fresh-blasted part and a blasted part that got solvent-wiped and dried.
PRACTICALLY you're well served to give it a bit of extra solvent cleaning after abrasive cleaning. If you used virgin grit aluminum oxie to blast with then MAYBE you could skip the solvent wiping, but you almost can't get all the grit off without some elbow grease (applied via clean, solvent-soaked rag). |
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Quoted:
THEORETICALLY you get more surface (superficial) oxide formation if you clean with solvents after abrasive cleaning and allow those solvents to evaporate. You can even see this visually if you compare a fresh-blasted part and a blasted part that got solvent-wiped and dried. PRACTICALLY you're well served to give it a bit of extra solvent cleaning after abrasive cleaning. If you used virgin grit aluminum oxie to blast with then MAYBE you could skip the solvent wiping, but you almost can't get all the grit off without some elbow grease (applied via clean, solvent-soaked rag). Yep! Yep! 
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