Trouble with clear coat

[Guest]

Rookie mistake today....Using an Eastwood Hobby Gun I shot some gloss white on test piece with the intention of clear coating it....best to learn on my own stuff....After a full cure of the white I let the part cool to about 180 degrees and HF the clear on. About half way through the second cure I opened the oven door to find that the clear had started to run, actually drip. I finished the cure cycle 380 degrees for another 10 minutes. This time, another surprise...the clear yellowed, the part has a beige look to it.

I should have read through the threads to know that HF is a no-no. I'm guessing I put it on to heavy which caused the running.

Ah well, guess I'll have to pony up for a gun that permits second coats without having to HF.

[Guest]

Re: Trouble with clear coat

Yea I know that color personally. to hot on the cure for the clear. I would guess you went way to heavy to get it to drip like that. Like seriously way to heavy.

[Guest]

Re: Trouble with clear coat

Dont worry about it man, Ive dont the same thing with color on the first coat Yeah, way to thick. The thicker you put on the clear, the more yellow it looks. Most clears, I have found, are best as thin as possible.

[Guest]

Re: Trouble with clear coat

Recommended mil thickness for clear is 2 mils...I would check your thermostat on the oven, clears will yellow and run if they are cured too hot. What clear are you using?

[Guest]

Re: Trouble with clear coat

Thanks for holding your laughter guys.... I used Eastwoods Gloss White and Full Gloss.

[CumberlandCowboy]

Re: Trouble with clear coat

I did it too not so long ago, but I'm a closet case on my mistakes......LOL.

Too much powder and HF'ing happen to everybody. I used to get a buildup from too much powder and gravity around the lips of my mics.........Every tip I've received on the forum has worked flawlessly........these guys are a great source tips an knowledge, not to mention great folks all together.

BTW, I stopped HF'ing all together. I shoot everything cold. It takes FOREVER when I'm standing there waiting for the part to cool, drives me nuts, but I get a lot better results. With a good ground, shooting multiple coats cold doesn't seem to effect me. It could be that my mics are small...........still haven't shot anything larger than my fist...........

Jeff

[Guest]

Re: Trouble with clear coat

Welcome I think you know what you did, And Yes happens to everyone Kep at it and good luck..

[Guest]

Re: Trouble with clear coat

Thanks for holding your laughter guys.... I used Eastwoods Gloss White and Full Gloss.

I have no clue as to their clear, sorry...I would still check your oven regarding the temperature, most powders should not liquify @ 180 degree's so she may be running hotter than you realize

[Doogles]

Re: Trouble with clear coat

As I recall Eastwoods clear likes 385 and 10 minutes from flowout...

[Guest]

Re: Trouble with clear coat

Thanks for holding your laughter guys.... I used Eastwoods Gloss White and Full Gloss.

hey I recognize that color right off because I have made that color myself

[JHForman]

Re: Trouble with clear coat

Was the clear melting as your were putting it on? It looks like it was shot too hot. Hot flocking works well, but can also cause problems till you perfect it. I can get runs like that when I hot flocked about 150 degrees.

[wiseguyz]

Re: Trouble with clear coat

Nothing worse than getting the runs when you're powdercoating!

[Guest]

Re: Trouble with clear coat

yea, the clear was melting as soon as it hit the part. My IR thermometer read 180 degrees when I started to shoot the clear.