Problems painting wood dashboard, lacqure is bubbling bad.

[tomfc]

Ok well i prepped my dashboard, gave it a nice dusty coat first, let that tack off then gave it a nice coat of lacqure, i let that tack off and gave it another coat, let that tack off and finally a heavy final coat.

This is the method i used when painting car panels and has never let me down, and it appeared initually to work perfectly with the dashboard.

When i first painted it it came out like glass and i was really pleased, it stayed like this for about an hour then these horrible little bubbles started to come through and after about 2 hours it was completely covered in them.

I then sanded the dash back till the bubbles were gone and lacqured it again, using the same method, but exactly the same thing has just happened again.

So now my question is how can i solve this problem?

Here are some pictures showing how extreme the bubbling is, there are some aread that havent bubbled atall and have stayed smooth, but i just took pictures of the effected areas:

 

[the snooper]

what laquer are you using ?

 

[tomfc]

2 pack, im not sure on the brand as its in the garage, but i have used it loads of time and not had any problems.

I even lacqured a panel the first time i painted the dash and that cam out perfect and that was out of the same mix in the same gun...

 

[the snooper]

i would say its something in the pannel reacting with the 2k to create some sort of gas hense the bubbles, dont really know what to suggest as wood is porous so how would you remove it.
you could try drying out whatever is in the pannel with a hot air gun then give 1 sealing coat of 2k leave it to go off fully, light flat and re-coat

 

[jaykay]

is it wood??if so clean it right back,wash it with celly thinners.then use rustins plastic coating,they say brush it on.but i've sprayed it ok.

 

[tomfc]

Thanks for the replies, i have now rubbed it back again, and i have now given it a coat of brush on wood varnish, ill give it a couple more coats, then ill try flatting this back and see if the lacqure will work on the varnish finish.

 

[mike os]

i would not... varnish & polish & leave

probably air trapped in the "detail" of the wood

 

[jaykay]

your using the wrong products for the job.2k was never meant to go on wood.
and if you try to put that over a brush lac/varnish it will be ever a worse mess.

 

[the snooper]

your using the wrong products for the job.2k was never meant to go on wood.
and if you try to put that over a brush lac/varnish it will be ever a worse mess.

2k urethane is fine for wood BUT i have discovered that you need a urethane sealer for the wood first

now we know

 

[jaykay]

i've yet to see a spec sheet saying car paints/lacs can go on wood.

 

[the snooper]

its only urethane and its not limited to steel theres is aluminium, fibreglass and so on do a search for wood finishing im sure it will pop up.

 

[jaykay]

you hit it on the head in#4 gases trapping. i know its not limlted to steel,but steel,ali,grp. are not porous.the wood is.so it hold the vapours that then come out in the form of solvent popping.
rustin's plastic coating is made for just the sort of job in hand.it's the best stuff i've found for all woods.

 

[the snooper]

Thanks for the replies, i have now rubbed it back again, and i have now given it a coat of brush on wood varnish, ill give it a couple more coats, then ill try flatting this back and see if the lacqure will work on the varnish finish.

it will probably lift the varnish like nitromors

 

[jaykay]

it will for sure.

 

[tomfc]

Thanks for the debate, ill have a go with the varnish i have at the momeny and see what sort of finish i can get through brush painting, is it possible to flat and polish varnish once its fully cured?

If the varnish doesnt work out i will get some rustins plastic coating and see how that works lo.

Will hopefully get there eventually.

 

[jaykay]

most oil based varnishes does not lend it's self to flatting and polishing.it take a long time to thru dry.
the rustins is a 2 pak product.in that you have a hardener that you mix with it.you can flat that.they do a special polish called burnishing cream.works a treat.
you will get the finish like on jag dashboards.