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[Inkmark]

Hi Guys
I have some fittings made in a sort of green/grey resin and I am having a job to get paint to stick.
I am using Humbrol enamels and pin prick spots appear when the paint is wet.
I have read all the wisdom here and have tried hot soapy water, white spirit and cellulose thinners and the results is the same.
I have had this trouble on car panels when silicone from polish is present but in the past thinners has solved the problem.
I have tried a larger fitting and flattened the surface with 400 wet and dry still some spots appear when the paint is wet.
Is there some sort of special release agent used that is immune to removal?
Any ideas would be gratefully accepted.
Cheers
Mark

[Fleetcom]

Use grey plastic primer first. Available from Kevin Coopers etc.

Before spraying the casting we brush it lightly with acetone.





Edited

[Fleetcom]

I ought to further explain. Fleetscale fittings are special resin poured in silicone moulds. To give the moulds a longer life a spray release agent is used. Some of our fittings we supply assembled i.e. 911 Tracker, Goalkeeper, Merlin 101 etc and we always spray them with grey plastic primer (Hycote will do) and do not have a pinhole problem.

[Fleetcom]

I should have said that before spraying the casting we brush it lightly with acetone.

If I could find an edit button I would have added this to the last post!
Done

[Inkmark]

Mr. Fleetcom
Thanks very much for that.
Just trying to work out yesterday why the primer would not stick either.
Acetone!! I will try that, perhaps raid the bathroom cabinet for some nail varnish remover
until I can find somewhere to buy some proper stuff.
Cheers
Mark

[Fleetcom]

  I will try that, perhaps raid the bathroom cabinet for some nail varnish remover
until I can find somewhere to buy some proper stuff.

I wouldn't do that for 2 reasons:

(1) I think nail varnish remover may have added oil to prevent the acetone drying the nails out. I think?

(2) her who uses the nail varnish remover might find out. 

Ray

p.s. Scott Bader have retail depots all over the UK. All GRP supplies are available in small quantities including acetone.

[modelbob63]

I use halfords car primer and paint in acrylics and finish in a product called dullcoat
Bob (40 years a figure painter)