 Paint issues 101, Blushing |
|
|
|
Porsche, and the Porsche crest are registered trademarks of Dr. Ing. h.c. F. Porsche AG.
This site is not affiliated with Porsche in any way. Its only purpose is to provide an online forum for car enthusiasts. All other trademarks are property of their respective owners. |
|
|
| scotty b |
 Apr 30 2014, 07:32 PM
Post
#1
|
|
rust free you say ?  Group: Members Posts: 16,375 Joined: 7-January 05 From: richmond, Va. Member No.: 3,419 Region Association: None  |
Just a little heads up and info for those of you painting your own cars. Today I had an issue with blushing. In all the years and all the cars I have painted this is the FIRST time I have encountered it.
As I understand it ( Rick, please correct me if I'm wrong ) what happens is on high humidity days ( today was EXTREMELY high ) you have a battle between the solvents trying to escape the paint, and the moisture in the air trying to settle. Well in the world of physics, water is heavier than the solvents so the moisture gets trapped in the clear. I have painted on high humidity days many times, on rainy days many times, on hot days many times, and on days consisting of all 3.....many times yet for some reason today it happened. One of those lovely things about this work (IMG:style_emoticons/default/dry.gif) The solution ( for now ) was to lay on a couple more coats of clear then let the fan run for about an hour. As soon as I shit the fan down, the blushing started up again. I let the panels sit until the clear was almost setup then cut the fans on again, this seemed to work. I'll know more in the morning. If it is still there, best case I can wet sand and buff it out. Worst case, all 3 panels have to get sanded down and repainted (IMG:style_emoticons/default/headbang.gif) What looks to be out of focus is the blushing issue. In person it has a nice rainbow look to it (IMG:style_emoticons/default/dry.gif) Attached image(s)  
|
   |
 
|
  |
Replies
| rick 918-S |
Apr 30 2014, 09:36 PM
Post
#2
|
|
Hey nice rack! -Celette Group: Members Posts: 21,239 Joined: 30-December 02 From: Now in Superior WI Member No.: 43 Region Association: Northstar Region 
|
Wow! The last time I had that issue we were shooting lacquer. (Man am I old.. (IMG:style_emoticons/default/dry.gif) )
You'll need to kick up the heat to combat the humidity. Be sure the sealed surface is warm. If you have a heat lamp you may want to warm the panels. In a production operation this only doubles your time spent in prep. (IMG:style_emoticons/default/wacko.gif) On humid days I would even solvent wash my body work and use a heat gun to warm the panels before spraying out any primers. You we had lacquer primers back in the day. (IMG:style_emoticons/default/confused24.gif) Hey it's what we had and it would blush. We were more concerned about primer blush because that means moisture could be trapped on the steel and would cause problem down the road. Based on what I'm seeing in the photo I'm not sure the blush is any deeper than the surface of the paint. Did you see anything on the sealer? We used to sand an buff to remove the haze on lacquer and never really had a solvent popping issue or delamination. Sux though. (IMG:style_emoticons/default/mad.gif) |
|
|
|
Posts in this topic
scotty b Paint issues 101 Apr 30 2014, 07:32 PM
Elliot Cannon My first try at painting was such a disaster, I do... Apr 30 2014, 07:40 PM JmuRiz The panel was just too shy to have its picture tak... Apr 30 2014, 08:40 PM Kirmizi How much have the paint chemicals changed over the... Apr 30 2014, 08:50 PM scotty b Nathan, if you guys had 100% humidity you lucked o... May 1 2014, 07:39 AM
bulitt
The blushing was definitely in the clear. I shot... May 3 2014, 11:41 AM ThePaintedMan Interesting. I had a similar situation when puttin... May 1 2014, 07:48 AM Racer Chris I thought that slow reducer was recommended in hig... May 1 2014, 10:48 AM scotty b it is. there is even extra sow. Neither made a dif... May 1 2014, 11:33 AM r_towle
it is. there is even extra sow. Neither made a di... May 1 2014, 01:14 PM ClayPerrine I can't comment on this, as I have only painte... May 1 2014, 01:20 PM r_towle
I can't comment on this, as I have only paint... May 1 2014, 02:01 PM ClayPerrine
I can't comment on this, as I have only pain... May 1 2014, 02:05 PM r_towle
[quote name='r_towle' post='2031972' date='May 1 ... May 1 2014, 02:48 PM rick 918-S OMG! :rotfl: serious topic on a potencially ... May 1 2014, 01:51 PM Andyrew Very interesting.
Could the moisture trapped cau... May 1 2014, 01:51 PM scotty b
Very interesting.
Could the moisture trapped ca... May 1 2014, 03:58 PM ClayPerrine
Clay...shit yer mouf <_<
It's you... May 2 2014, 09:45 PM scotty b
Clay...shit yer mouf <_<
It's yo... May 2 2014, 09:46 PM bulitt :alfred: <_< May 1 2014, 02:17 PM sixnotfour http://andrew.rsmas.miami.edu/bmcnoldy/Humidity.ht... May 1 2014, 08:37 PM r_towle Scotty, for educational purposes, could you explai... May 3 2014, 08:12 AM Eric_Shea He uninstalled his spell checker. May 3 2014, 09:04 AM Dr Evil Southern Spell Checker May 3 2014, 09:09 AM r_towle Sand and buff?
It's a serious question.. May 3 2014, 10:44 AM scotty b
Sand and buff?
It's a serious question..
not... May 4 2014, 06:22 PM |
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:
|
Lo-Fi Version | Time is now: 2nd April 2026 - 11:31 AM |
Invision Power Board
v9.1.4 © 2026 IPS, Inc.