damp/wet sanding questions

That 'Burb is gonna be the best on the block for sure! It's really looking fantastic. My wife cracks up every time I look at these forums. I see your work and get all geeked up to do her car. She does like the fact that she benefits from my cleaning passion. I haven't been brave enough to venture into wet sanding. Seeing your pics though, I may have to dive in.

Going for the best daily driver with 100k+ miles in Minneapolis.

If I were you, I would practice on some scrap panels or a crappy car before trying anything important. All it takes is to over sand an area, then over buff it and you have no clear left. I've been lucky. I jumped right in on decent cars and haven't damaged anything yet.

The hardest part is getting the sanding scratches out. I spent 4 hours on half a door when I didn't get the 1500 and 2000 scratches out well enough.
 
Had a great time hanging with Rasky (Chad) at his shop yesterday morning. We took some PTG readings and talked shop for a couple hours. My brain is nuked, but I have some good ideas for making some improvements to quality and speed of my work.

Lucky!

I'd love to hang out with Rasky and talk detailing for awhile. I need to speed up my process, too!

Randy
 
I did the passenger side upper door panels last night and this afternoon. I spent about 5 hours last night (until 3am) then a few more hours scattered about today. If you haven't done something like this before, I can't stress enough what a pain in the butt it is to remove sanding marks from an OEM paint. It will all be worth it in the end, but man.... :buffing:

- 1500 by hand with a Mirka double-sided backing pad
- 2000 "
- 2500 via PC (3 and 6")
- 3000 "
- 4000 "
- M105 via rotary with both 3 and 6", either with wool or LC orange
- M205 via rotary with LC orange

I'm saving the jeweling step until I get the whole truck done and am ready for Opti-coat, just in case I get any marring along the way.

You may see a few random sanding scratches (and a smudge on my lens). I plan on going over one last time looking for those before my finishing steps. I'm usually in a time crunch so I get done what I can.

Check it out:

IMG_6554.JPG


IMG_66101.JPG
 
Update: I'm about 2/3 done sanding and buffing. Rasky is coming Saturday to help Opti-coat what is done, then I'll finish the rest once I'm done sanding.

I borrowed some D300 and microfiber pads and tried those out with the G100 and wow- what a difference! VERY easy to use and safer working near the edges to get the sanding marks out. I will also be trying out Optimum's polishes to finish out nicely and not have to prep with IPA before applying Opti-Coat.

I had an unfortunate experience a couple days back where I struck through the clear on a narrow door pillar. I wasn't being careful about the angle at which I was sanding and was moving the pad straight up and down with the edge parallel to the direction of motion and wore ruts in the paint. I knew better than to do that, but I was cheating with the narrow space and thought I could get away with it. Once I got it buffed out with the D300, it went through. Rasky is bringing some Opti-Guard, which I guess is a little thicker than Opti-Coat, in hopes that it will hide it a little until I can get that pillar resprayed (a buddy of mine has a paint booth and paints at a body shop as well). No biggie. I'm just glad it's my truck and I caused it! It certainly makes me respect the sanding process even more and I'll be more careful in the future.

My recommendation to anyone considering doing this to their factory paint is not to do it. I'm going to have close to 60 hours into this. I now have 20-30% less clear on the truck and probably isolated spots where there is less (or none, in one case). It's VERY difficult to remove sanding marks on factory clear (this clear seems to be fairly hard). Even 3000 grit is taking D300 with a fair amount of pressure and very slow arm speed and I still don't get all the scratches out in one pass. It's also difficult, while working at other things and watching my kids and such, to have to drag my stuff out, clean a panel and work on it, put all the stuff away, come back to it a couple days later, all the while my wife is wondering where her husband went. :( In hindsight, I think I would give it a good once over with D300, Optimum polishes and Opti-coat and enjoy the gloss and paint thickness and especially more time with my family.
 
If you've followed this thread and haven't noticed yet, I posted a synopsis of my work on the Show N Shine page. Thanks for looking!
 
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