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-   -   Sand thru a big deal on a SS black paint job? (pic) (http://www.hotrodders.com/forum/sand-thru-big-deal-ss-black-paint-job-pic-219123.html)

novafreek6872 05-07-2012 08:11 PM

Sand thru a big deal on a SS black paint job? (pic)
 
I would like to topcoat these panels as they sit, They are blocked all the way to 600. Or would that be unadvisable? You can see I have a little sand thru on the doors and some what more on this fender. The black spots are epoxy primer and the grey is 2k Urethane. Topcoat will be SS Urethane in Black.

Thanks guys

Andy

http://i1075.photobucket.com/albums/...g?t=1336435597

Dave C. 05-07-2012 09:07 PM

IMO I would not worry and spray the base over it.

deadbodyman 05-08-2012 05:12 AM

same here...but if you have some epoxy already it makes a great sealer when its reduced..

novafreek6872 05-08-2012 10:31 AM

Would it be OK to spray on reduced epoxy then lightly sand it with 600 before my topcoat?

novafreek6872 05-11-2012 03:24 AM

I went ahead and guide coated and blocked the pieces more with 320. You can never block enough right?? ;)

Then I de waxed, tacked off, and sprayed two coats of non reduced epoxy to get everything nice and uniform.

I plan to next block them down again with 400/600 and possibly start with 320 if the 400 looks like its going too slow.

THEN, I will finally be ready to topcoat AGAIN ! (for the second time, contaminated gun (silicone) ruined my first attempt and had to sand it all off).

I will be using my old faithful siphon gun this time that I used on the hood I painted about a month back, hasnt let me down yet and did a wonderful job spraying epoxy last night. HUGE fan. :thumbup:

Plus I bought a super deluxe gun cleaning kit at my local auto paint store to keep everything going smoothly on this project from here on out.

WORD TO THE WISE: IF YOU BUY A GUN TAKE IT APART AND FIND OUT WHATS IN IT BEFORE YOU TRY TO SPRAY TOPCOATS WITH IT!!! Cost me 2 days work plus materials wasted. :pain:

May be common knowledge round here, but I didnt know...


Andy

BarryK 05-11-2012 06:52 AM

Quote:

Originally Posted by novafreek6872
I went ahead and guide coated and blocked the pieces more with 320. You can never block enough right?? ;)

Then I de waxed, tacked off, and sprayed two coats of non reduced epoxy to get everything nice and uniform.

I plan to next block them down again with 400/600 and possibly start with 320 if the 400 looks like its going too slow.

THEN, I will finally be ready to topcoat AGAIN ! (for the second time, contaminated gun (silicone) ruined my first attempt and had to sand it all off).

I will be using my old faithful siphon gun this time that I used on the hood I painted about a month back, hasnt let me down yet and did a wonderful job spraying epoxy last night. HUGE fan. :thumbup:

Plus I bought a super deluxe gun cleaning kit at my local auto paint store to keep everything going smoothly on this project from here on out.

WORD TO THE WISE: IF YOU BUY A GUN TAKE IT APART AND FIND OUT WHATS IN IT BEFORE YOU TRY TO SPRAY TOPCOATS WITH IT!!! Cost me 2 days work plus materials wasted. :pain:

May be common knowledge round here, but I didnt know...


Andy

Andy, are you sure it is the gun? I buy 2-4 new guns a year as i use them everyday and I have never taken a gun apart before spraying with it, yes i do shoot a coffee cup full of urethane reducer through it first but that is it.

If gun was contaminated, I would guess by second or third panel the gun would be clean and start shooting with no problems. Just a guess on my part.

The tech line averages 6-8 calls like this a day and I can say this with a 100% accuracy, 99 times out of a 100, it is always vapors coming from the air line, with out question.
One time out of 100, it will be other contamination, from car, shop or person painting.

Just a thought that might save you some headaches.

novafreek6872 05-11-2012 10:18 AM

Yep. Definitely the gun Barry. I should have got a pic of the inside. Right where the paint comes thru it was loaded up with gooey silicone. This is on of the cheapie HF purple guns BTW. Cost me a lot more than money! But I learned a valuable lesson. The hard way of course!!! I don't think ill ever trust a new gun again tho... at least a Chinese one.

Andy

novafreek6872 05-11-2012 10:25 AM

See my particular gun sprayed fine at first until the silicone they used on the threads of various parts started breaking down from chemicals in the paint I guess. That's where all the trouble started.

I'm really good at taking them apart now!! LOL. :-)

Handfull54 05-14-2012 01:27 PM

It's back to the old saying that applies to just about everything. " Buy cheap buy twice". Hope everything turns out OK. I wasted a gallon of paint which cost $400 because I bought a cheap compressor which could not keep up. Half the panels would be OK the other half was like suede all dry. So I bought a big compressor and problem solved. Just like most of us learn about trying to save a buck sometimes is not worth it.

MARTINSR 05-14-2012 01:57 PM

Nova, is any of this "contamination" on vertical surfaces? All I saw it on was the horizontal surface of the door laying on it's back. If you see only contamination on the horizontal surfaces (stuff falling on it from the air) and none on the vertical surfaces, keep an open mind.

Brian ;)

novafreek6872 05-14-2012 05:14 PM

Brian, YES, its definitely the gun, trust me! BEWARE: Buyers of cheapo HF PURPLE guns...THEY ARE LOADED WITH SILICONE CRAP!!! CLEAN GUN COMPLETELY BEFORE USING!!!!


Short HD vid of a finished product HERE: http://www.youtube.com/watch?v=k0GO2...ature=youtu.be

Andy

novafreek6872 05-16-2012 09:22 PM

took a few pics today outside. I'm happy with how its coming along. Also used purple gun #2 today to spray some epoxy on other parts (i took it apart and soaked it for 2 days in lacquer thinner before I ever used it and scraped all the silicone sealant out. Replaced with carefully applied teflon tape.) Happy to report that I had no fisheyes and it sprayed wonderfully. Cant wait to try it out with the topcoat. :) The dust you see in the 3rd pic is NOT in the paint. The parts sat out in the sun all afternoon and got a little dusty.

Andy

http://i1075.photobucket.com/albums/...project031.jpg

http://i1075.photobucket.com/albums/...project030.jpg

http://i1075.photobucket.com/albums/...project029.jpg

MARTINSR 05-16-2012 10:51 PM

WHoo HOOO damn those look good!

Brian

Handfull54 05-16-2012 11:26 PM

Very nice. You should be proud of yourself. Shows what time and patience can do. Like I thought when painting my truck' "who is going to care more about this paint job than me?" Take a couple of bows. You earned it.

novafreek6872 05-17-2012 06:29 AM

THANKS FOR THE NICE COMMENTS!! :) Decklid (top) and driver fender are next up, they are in epoxy primer waiting for a final wetsand then topcoat. Hopefully the 1.4 HF gun will give me a smoother finish than my "primer gun", in fact I'm sure it will, and I will have less work to do AFTER the paint dries.

After that I will tackle the hood and cowl panel, and finally the biggie: the back half of the unibody. The quarters will require a ton of priming, blocking, and maybe even some filling, they are the primary trouble area of the car. Lots of ripples.

I'm very happy with how its coming and every day is a new day, no need to dwell on the crappy things that happen from time to time. :thumbup:

Andy


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