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Author Topic: Humbrol Paint  (Read 1874 times)

Gra

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Humbrol Paint
« on: August 29, 2010, 08:44:16 AM »

Hi,
Mixed equal quantities of Humbrol 23and65 to obtain colour i required.
Used single action air brush to paint surface.
Finish came out as if it was full of grit.
When dry grit appearence mostly subsided but surface feels rough.
Has Humbrol quality dropped?.
Have members any ideas.

Gra
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Prophet

  • Guest
Re: Humbrol Paint
« Reply #1 on: August 29, 2010, 10:26:31 AM »

just a question was one a matt paint and the other a satin or gloss?

that mix sounds to me one of a few things one being that one paint was a matt mixed with a gloss or similar, the other could have been your air gun how far away did you spray? if you sprayed to far away the paint may have been drying just as it hit the hull this is a common problem with all spraying of any form, the other is to close you could have pushed to much air over the hull leaving bubbles, or runs which are more common in spraying to close and finally dirt on the hull before spraying did you wipe down the boat first?

What are you spraying onto wood or grp or abs? if its wood you should use a decent wood sealer before final painting, filler on low points etc, grp make sure the surface is dead smooth, same for abs. before you spray be sure to wipe down the area with some sort of cloth that will remove dirt and grit of the surface ( i used car body work wipes) did you spray a primer as a base coat?

heres my method for a nice finish ..

sand hull up to 2400 grit wet and dry, wipe down spray primer check for high and low spots fill with car body filler, and sand, sand low spots, primer again re-check for anything missed , i tend to do between 2 and 3 coats of primer on the hull ( thin coats! ) light sand with 1200 grit and wipe down, spray base colour ( 2 coats generally ) then mark water line sand 1200 up to or above waterline pending on base colour wipe down and mask and spray water line, 2 coats again generally wit till dry and sand whole hull lightly with 2400 and then clear coat 3 light coats generally with a light sanding with 2400 inbetween. once fully dry i give it normally a week ( allthough 48 hours is fine) then i buff it out to a glass finish  :-))

i can use this method for both air brushing or spray cans
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Gra

  • Guest
Re: Humbrol Paint
« Reply #2 on: August 29, 2010, 10:52:58 AM »

Hi
Both matt colours.
Surface primed grp.Perhaps i was to close to surface,will keep this in mind.
Using approx 35psi pressure perhaps this is to high.
Have always used Humbrol in the past with the above psi with no problems.
I did make sure that surface was dust free with a wipe etc.
Thanks for advice. 
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Prophet

  • Guest
Re: Humbrol Paint
« Reply #3 on: August 29, 2010, 11:04:17 AM »

lower the air pressure do some on a test area see what works best check your spraying distance i do it around 8" with an air brush and around 10" with a spray can. the Matt paints will give you a 'rough finish' thats what Matt's are, if your after a smooth glossy or satin finish you will need to spray a clear satin or gloss coat over it to achieve that finish.

i always do some test spraying to be sure i have the correct mixtures or finishes before i ever spray the boat i hate extra work !
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John @ WEM

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Re: Humbrol Paint
« Reply #4 on: September 06, 2010, 03:29:35 AM »

Humbrol is now being made in China. 'Nuff said....
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Gra

  • Guest
Re: Humbrol Paint
« Reply #5 on: September 06, 2010, 07:33:32 AM »

Exactly my thoughts.
Never had a problem in the past.
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John R Haynes

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Re: Humbrol Paint
« Reply #6 on: September 06, 2010, 09:57:50 AM »

Sounds to me as if you are spraying too far away from the subject .
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Gra

  • Guest
Re: Humbrol Paint
« Reply #7 on: September 06, 2010, 10:42:16 AM »

Thanks will keep above info in mind.
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