Best time/temp for Tight Spot Coating

[Guest]

I know all of us from one time or another have a place that powder just does not want to really go as much as needed to be there. I have been lucky so far and always managed to get it where it needed after it started heating up and would open the door and give it a shot or two and done. I think for the most part I just wait till I see it starting to flow just a bit and do it and have had no problems. I did a big screw up last week and didn't have my head out of my "A" on a set of wheels and boy has that been a chore and hope to re coat tomorrow

So I thought I would ask this question so I can print out the info I need for the future when brain no working and also should help other new guys starting out and just maybe get them out of a jam MAYBE It could be a gamble either way? But I would say a + one most of the time.

[BeeBob]

Re: Best time/temp for Tight Spot Coating

If I think I need an extra shot of powder on a thin area, I'll pull the part just after complete flow out and touch it up. The part will be hot enough for the powder to melt and still blend in with no sandpaper over spray probs. You DO have to watch out that you don't put that last "little extra shot" of powder on it , cause that can get you runs or sags.

[Guest]

Re: Best time/temp for Tight Spot Coating

If I think I need an extra shot of powder on a thin area, I'll pull the part just after complete flow out and touch it up. The part will be hot enough for the powder to melt and still blend in with no sandpaper over spray probs. You DO have to watch out that you don't put that last "little extra shot" of powder on it , cause that can get you runs or sags.

Thanks for the reply. The sandpaper effect I just took my hit on that mistake. never had a problem before but that was on just one part not a set of wheels I missed spots on! I added some extra lights to help and just maybe I will be able to see better this time? My paint bay does great for cars (or did) but hanging 4 wheels and light coming in from the back side as well as behind you can mess and old pair of eyes up in a heart beat and even my son didn't see it!!!!!!!! I get him glasses maybe

[banditpowdercoat]

Re: Best time/temp for Tight Spot Coating

Really tricky parts, ones that I know are gona be a pain, I heat to 200 or so first, then shoot the tough spots FIRST. then, as she cools shoot the easy spots and usually gets nice even coat. For sure on the "one more shot" thing. Have caused my share of runs.

But allways start spraying the tight areas, the Faraday areas and such. If you spray them first, hot or cold, then less chance of over powdering a section like trying to do the tight spots last.

Lower the voltage as well. With my EW and Caswell gun, alot of time I will hit charge switch initially, then release switch while spraying the corners. On/Off/On/Off with the charge switch, can sometimes help powder get into tight recesses. With these 2 guns, alot of times I will NOT use the diffuser on the end, or use a reallly small one i made up. Lower air pressure and shoot powder straight into crevase. That is the handiest thing about the Hobby guns I think. There is some places that my Nordson has a heck of a time reaching.