Talk Composites - The Forum for Advanced Composites

Clear Coating Carbon parts.

http://www.talkcomposites.com/Topic3073.aspx

By fgayford - 10/14/2012 11:03:09 PM

Ok, now that I have pin hole free parts I now have another what seems insurmountable problem.

No matter what I have done I cannot get the clear to laydown without small craters in the outer surface of the clear. I am talking very, very small ones.

Here is what I have done.(and by the way I have been spraying clearcoat for years so I know how to do it, its just carbon panels that give me the problems)

1. Wash with soap and water - scuff with 600 or 400 wet and dry paper - wipe with prime wash -  spray. (pits)

2. Wipe with alcohol -scotch brite with grey ultra fine - wipe with 99.9% pure alcohol. (pits)

3. Scuffed as above - eliminated my spray equipment and sprayed clear with a spray bomb. (pits) 

4. Heated the part and spray bomb - sprayed fog coats - let flash well- built up to shiney. (pits)

5. Scuffed with "OLD DUTCH CLEANER" - sprayed with rattle can. (pits)

What the is going on!!!!! This is the pits!

Are you guys not getting these surface bleamishes ???????? 

The only thing that I can think of is that the carbon fiber is conductive of electricity or I am dealing with electrostatic repulsion.

I know that you cannot spray a plastic bumper without eliminating the electrostic fields.

Thanks for any help on this. Hopefully the Easy Composites Staff can clear this up!     Get It?  Clear this up!

Fred
By fgayford - 5/6/2017 9:36:17 PM

Fasta (05/05/2017)
I know my local paint shop next to my business is quite careful about silicone sprays etc. 

He doesn't use any but tells me how a customers car may come in and have residual stuff from tyre sprays or other which can make big problems with every job in their shop. If a customer tell him they have been spraying it on tyres or anywhere on/in a car then he will turn them away and not take on the job for fear of workshop contamination.

Silicone and painting just don't go together or anywhere near each other.


Yes.
Some times you don't realize your doing it to yourself.
Today I found my self spraying a silicone mold with a release that was 3% silicone DUH!
Well at least now I have the cure. Hard won battle for sure.
Fred