Just finished my first wet sand - ever. Any suggestions?

IPT

New member
Joined
Jan 21, 2014
Messages
9
Reaction score
0
Well, for my first time ever I'd say it went exceptionally well! I could have done a tad more with the 2000 grit probably to get out a few deeper 1500 scratches. Keep in mind these panels are just thin wood (2x4 sheet cut into smaller 12x12" panels). I scuffed the paint (it was pre painted bought at Home Depot) and just painted them. No high build primer, no block sanding, very little prep at all.

This was literally my first time spraying (auto) paint and I was using a Turbine setup to boot. Got some orange peel but oddly the worst of it was in bands (yes the gun was always equally distant to the piece). The OP banding happened on all the panels in the same pattern so it's likely I had a small blockage or clog or something with the gun setup.

Anyway, it was painted with PPG paint black base and 2 coats of clear. It cured for 6 months so I thought it might be tough to sand. Nope, sanded down real quickly. I started (all wet) with 1200, then 1500, then 2000. Then I buffed with my 7424XP an orange pad and Menzerna FG400. Need to do that 3 times to get out all the sanding marks (probably should have started with wool, but I never did that before. Guess I need to read about using the wool pads). Then I did one section pass with a white pad and Menzerna 4000.

The paint still has a tad of wave to it. Could be so many things since like I said my prep was quite minimal. My final goal is too be doing airbrush work on these panels. Maybe on some car parts, my Home theaters DIY sub-woofers, and anything else that'll stand still long enough to be painted
smile.gif
. Actually, I'd love to paint my snow bike in a Kandy. That'd be sick.

So, I'll post again once I get the Denim pads and use them. If anyone has any comments I am all ear (or eyes as the case may be). I'm here to learn.

Final sand at 2000. In retro spect looks like I still have some 1500 grit marks. I did each grit perpendicular to the prior one.



Before and after - worse OP was along the top edge - right side is "from the gun".




Before and after 2

 
For first time I think you did GREAT! :dblthumb2:


Sanding is always the easy part... that's putting scratches into the paint. The tricky part is getting them 100% out of the paint.


You can remove sanding marks with any too and even by hand, but the fastest way is with a wool pad on a rotary buffer. After I hit the [Submit Reply] button on this post I'm going out to the garage to set up our demo hoods for this same thing, wetsanding.

We'll be going over hand sanding and machine sanding techniques and one of the many things I'm going to show the class today is how it's always easier and faster to remove machine sanding marks versus hand sanding marks.

We'll do both hand sanding and machine sanding and I guarantee after everyone has done both moving into the future they will all want to machine sand when sanding is needed.

One of the handiest tools for doing small work is the Griot's Garage 3" Mini Polisher used with either Meguiar's or 3M 3" sanding disc. Easy to control, faster than hand sanding and the sanding marks buff out fast and easy.

:)
 
What Mike stated I tried at the collision shop I worked and def a huge different when wet sanding by machine. I had a old hood with lots a scratches and marks everywhere and start to looking like I can sell it to anyone who needs a blue Jeep Cherokee hood. Even my boss doubt I will be able to fix it. Mike`s video has helped me a LOT!!! to get better and better with my techniques and expanded my knowledge not to forget what the guys here in the forum share day by day.
Looks good buddy keep practice, there is always room for improvement.

Edwin
 
Thanks Mike and Edwin. I did in fact order a 3" backing pad for my PC with the 3inch denim pads. Guess I should have got some sanding discs too! Easy enough to grab those. If the PC proves to be to wieldly for the job I will check out Griot's Garage 3" Mini Polisher. I've seen you mention that before Mike but I'll see if I can get away with the Flex or PC with a smaller backing plate first.

Thanks for the thoughts/input.
 
Ive always wetsanded by hand. I like to get all up close and personal with my work. Mike is definetly right getting them out is tricky. Will definetly take a few passes. I always heavy cut with wool followed by medium to fine compound with foam. Then i use 3M ultra fine machine polish with a finishing foam pad. Low speed on my rotary and polish the heck out of it. Good luck and keep practicing. When I was first learning i was able to get a bunch of scrap panels to practice on from local bodyshops.
 
So I have never used a wool pad. I do have a purple one. Is the process the same as it is for the foam pads regarding application of compound, passes etc?
 
Back
Top