Quote:
Originally Posted by bmwpowere36m3
I'll say it's possible, it's how they blend panels after body work. However it really depends on the condition of the paint... are you doing the work yourself? Really you can't sand with anything coarser than 400 because it will put in deep scratches into the base coat that the clear coat will amplify after its laid down.
You could sand with 400 to get the majority of the clear off, then 600 (and then 800 if it's a metallic base color).
|
Where did you get this? It is
NOT how they "blend panels". This is exactly what I was talking about in my last post - I can tell by the way you explain things that you are not a painter.
First of all, a 'blended panel' blends into something that's
already finished - the clearcoat is in good condition. You scuff it so the new clearcoat has bite, or 'key'. A scotchbrite pad works well for this. If you're blending base coat into it then it goes over what's there and everything gets cleared over. Wet sand, buff/polish.
As soon as you hit a metallic finish it's toast.
You cannot sand a metallic finish, it ruins it. It has to be laid down fresh and clearcoated.
400 grit will NOT remove flaking clearcoat. And just how exactly will you know when to quit sanding the old clear before you get into the base color? Are you kidding me? Plus, if it's flaking in one area then it will continue to do so, so why would you paint over it? Will clear coating over old flaking clear coat stop it from flaking, bubbling, and peeling? I didn't think so.
It's also very rare to patch within a single panel, rather an entire panel is refinished to it's edge or to a seam.
500grit finish sanding cannot be discerned under a final finish once it's wet-sanded and polished. The finish coats
fill in fine scratches, they don't "amplify" them. Yes, they are easier to see because of the gloss, but they aren't amplified. Some buffing compounds are 'body shop safe' just for this reason, so you can buff primer to a sheen to see imperfections. Then it's lightly sanded to key the next coat(s).
Show quality finishes since 1975.
