Pinholes in filler

[mm289]

Simple question really,

done a skim of about 2mm of good quality filler and have a small number of pinholes.

Just wondered if this was normal or what the causes could be?

Planning to take out with some stopper of when I put the hi build primer on.

Cheers,

MM

 

[pedrobedro]

If it's leaving pinholes it's not that good quality. Usually putting bulk filler on thick causes pinholes but at 2mm it should have gone on smooth. What make was it so we can avoid it

 

[langy]

What make is it ??? some pinhole like mad, good ones not so bad, also makes a difference how you mix it.

 

[Chickenjohn]

Just use some stopper, then prime.

 

[mm289]

Make is Roberol, recommended by our paint supplier.

Mix was done on an onion board in small quantities.

Only variable was temperature as it was only about 10-12 C but I did use a heater on it to help cure.

MM

 

[langy]

I've found that cheap fillers often pinhole which is a pain but they also sink badly which is a REAL pain, Don't rate the Roberol personally, Upol Fantastic is far superior.

Make is Roberol, recommended by our paint supplier.

Mix was done on an onion board in small quantities.

Only variable was temperature as it was only about 10-12 C but I did use a heater on it to help cure.

MM

 

[the snooper]

finish off with some top stop if you need to do any more filling

 

[sprayerDrew]

Roberlo maxilight shouldnt pin hole alot at all. Maybe how your mixing it or applying. Fantastic is far superior to aby other tho,

 

[mm289]

Roberlo maxilight shouldnt pin hole alot at all. Maybe how your mixing it or applying. Fantastic is far superior to aby other tho,

So asking the really dumb question.....

What can you do wrong in mixing/applying that would cause pinholes?

It was mixed really well, no streaks etc and applied with reasonable pressure.......

Cheers,

MM

 

[paintpot]

cheap filler ,get your self plastic padding.never put stopper in pin holes .you will find it will sink after awhile.

 

[langy]

Agree about cheap filler, but the plastic padding stopper is very good.

cheap filler ,get your self plastic padding.never put stopper in pin holes .you will find it will sink after awhile.

 

[mm289]

I have some Upol Dolphin which I was going to use as a stopper....

Any thoughts on how mixing/application might cause pinholes?

Cheers

MM

 

[paintpot]

what causes pin holing ,when you put in your first coat of filer ,some people like to put in a big dollop,instead of smoothing in there first coat of filler. So with that large dollop you have small cavities.With your second coat of filler ,you need to push in the filler as to fill in these imperfections,if you dont you will have pin holing.

 

[langy]

Also some of the cheaper filers have air in them already, I guess its the way they are mixed, its cheap for a reason i'm afraid.

what causes pin holing ,when you put in your first coat of filer ,some people like to put in a big dollop,instead of smoothing in there first coat of filler. So with that large dollop you have small cavities.With your second coat of filler ,you need to push in the filler as to fill in these imperfections,if you dont you will have pin holing.

 

[sprayerDrew]

Also some of the cheaper filers have air in them already, I guess its the way they are mixed, its cheap for a reason i'm afraid.

Fillers like u pol easy one are fluffed up like candyfloss creating air pockets and contain china.

My opinion try hb body platinum copied from u pol fantastic lovely filler and really well priced but for a little more wonga you can buy fantastic which is the best your choice

 

[mm289]

Thanks for the replies guys.

Filler was only put on about 2-3mm thick so I am guessing more of a prob with the filler than application.

Next stop Upol Fantastic!

MM

 

[h-magic]

You apply the heat directly onto the filler?
That will cause it to shrink and pin holes to appear.

Ive used rubilo and I like how it flows. Never had a major issue with pin holes using the product.