Restoration & Modification Projects > Restoration Projects
The DEMONX 1970 vert project Pt2
demonx:
I just had a hour and a bit private lesson from a PPG rep.
Yeah - blew my mind.
Cause I had the paint blistering and the paint shop contacted PPG about it since I described I was following procedure correctly, I had a PPG rep from Melbourne (2 hours drive from my house) call me and make an appointment to come and check out the way I'm shooting their products and try to work out where I'm going wrong and inspect my spraying environment.
I figured it was a whole thing where they send out a rep to rip shreds through me and say it's my fault not PPG's - however it turned out to be quite the opposite.
This guy asked a million questions on my procedure
He inspected and disected my blistered parts with a razor blade
It was at this stage he told me he believed that the base color was sprayed too early and the epoxy had not had time to cure properly. I informed him I had waited 24 hours between primer and basecoat - he said sometimes you cannot go by the sheet especially when I'm not spraying in a booth etc
He then used a elecronic micron guage and apparently my 2 coats of epoxy and 2 coats of primer in the "hard to spray"parts reached up to 800 microns.
THEN: because they were way too thick he wanted to assess my prep, setup and spraying technique.
We went through all that - he told me I am "extremely finnicky" when it comes to the measurements and all that part is perfect HOWEVER when it came to spraying technique and air pressure I had a problem.
I've always set my guns at the idle pressure rather than active pressure. I've never been told or taught otherwise. So when he went to spray with my gun and setup he told me the pressure is WAY too low and we went through all of that with his fancy guages etc, THEN after all that he continued to give me a detailed spraying lesson. He even asked if he could demonstrate on my eggcrate grills and taught me how to get to the VERY difficult parts correctly (very different than the way I tackled it) and gave heaps of other tips and pointers.
I've been spraying for years - but nothing can beat having a grey haired old man who seems to have been painting since he graffitied the inside of his mothers womb give you a few pointers from his years of experience. It's all that "real world" paint shop experiance that blows away my "read it on the net and had a go at it" experience.
Anyway - long story short - Aparently there is nothing wrong with my hardner or epoxy, apparently those swirls and the weird looking photo I posted are normal for that product (got me f**ked) and I have a whole heap of new info floating around in my head to work on to try get a better spray job.
PPG tech support is the BEST I have EVER encountered.
gtc:
--- Quote from: demonx link=topic=7212.msg1045936921#msg1045936921 ---PPG tech support is the BEST I have EVER encountered.
--- End quote ---
Impressive support indeed, given that you aren't a big commercial customer of theirs.
Hopefully all of the tips get you sorted going forward.
demonx:
--- Quote from: gtc ---
Impressive support indeed, given that you aren't a big commercial customer of theirs.
--- End quote ---
He actually mentioned while he was here he gets more satisfaction helping people like myself that are doing this for the love of it, rather than those just pumping out fast commercial crap jobs.
craigh:
Hi
I noticed in part one of this thread you have coated headers fitted to your vette and you said they fitted better than your old ones.
What brand are they. ?
I am looking at some Hooker ones at present for my 71 SB.
Regards
Craig
demonx:
--- Quote from: craigh link=topic=7212.msg1045936944#msg1045936944 ---Hi
I noticed in part one of this thread you have coated headers fitted to your vette and you said they fitted better than your old ones.
What brand are they. ?
I am looking at some Hooker ones at present for my 71 SB.
Regards
Craig
--- End quote ---
Sorry - you must have confused my car with somone elses. The Headers on my car are rusted out and I'll prob cut them up and throw them in the recycle! They appear beyond repair.
I did have a set of chrome Hooker side pipes for my car however I hit some hard times and had to sell a lot of the parts I was not using yet - so they are gone.
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