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Old 08-03-2004, 07:54 PM
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paint vinyl question

This isn't for a car but there seems to be more knowledge here than elsewhere. I have a fibreglass helmet, i am going to apply vinyl graphics on this, it is more or less fancy pinstriping but to complicated to paint the details. Now my question is what would be your preference as to paint, would you use an acrylic enamel to lay down your color then apply vinyl followed by clear to seal it in. Or would you do BC/CC, the only reason I wonder is because I am worried that the BC/CC may try to eat into the vinyl as it tries to bond. Any thoughts?

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Old 08-04-2004, 06:43 AM
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I would paint the helmet with whatever you want then put the graphics on. DON'T clear over the vinyl... It won't last and it will start to lift after a while. Especially with BC/CC. There is a chemical reaction between the two paints which is the bond. The vinyl won't provide the reaction so there will be no bond to hold the clear to it... There is also the matter of expansion rates. When the vinyl gets warm it wants to grow. It will grow more then the material it is attached to and then, when it cools off, it will shrink. This will delaminate the paint from the vinyl very quickly...
Leave the vinyl naked and it will last for a long time. Or do the graphics in paint...
Mark
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Old 08-04-2004, 12:22 PM
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All of this type of work I have seen done over base.
This is being done more and more on bikes tail gates etc.

Ist the decal should not be more than 40% of the panel area for good adhesion of clear.(most important)

Next on first coat when clear is activated reduce 50% with a FAST or MEDIUM urethane reducer, this will make the clear an inter-coat clear and the reducer will speed up the drying process so it does not attack the vinyl. Spray one medium coat and let set over night.
Next day nub if needed but don't break through. and clear however you want as the first coat will seal the solvent's from getting to the decal.

The most important thing is go to jobber and pay the money for a Polyurethane clear as it will handle the expansion as mentioned above.
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Old 08-04-2004, 12:37 PM
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Thanks Barry
I truely appreciate your knowledge and help
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