The Spray Painting Thread

[da_foles]

Also another questions. When cutting and buffing do you apply the cutting compound to say one panel then work on that panel in 1/4's? then move onto the next panel?
Thanks again for all the help from everyone on this thread

[da_foles]

ppg? does this mean clear? if so yes it is acrylic. primer paint and clear are all acrylic

[da_foles]

sorry missed that you were replying to DrNick

[turbocaldina]

yes do one panel at a time, bonnet do in quarters and dont let the compound dry to much and dont do it in the sun, always in the shade

[Z2TT]

Ah by tacky I meant it's rough the primer, it's not like smooth so I'm wondering if it went on pretty even do i even need to sand it, or is sanding only required if i want to get it all flat.

[DrNick]

is the ppg acrylic

Yep its all acrylic lacquer.

[turbocaldina]

you need to sand it flat to get the next coats on flat other wise the "peel" will show through, and the following coast will not stick to the primer unless it has been keyed up

[turbocaldina]

Dr Nick i wouldnt be thinning it more then 50/50 as the paint will not have enough thickness because the thinners evaporates out of the paint, you have to paint in the shade, cause if you do it in the sun the paint doesnt have enough time to flow out and go flat, and may be you could try slow thinners as that will let the paint dry slower and have more time to flow

[DrNick]

Dr Nick i wouldnt be thinning it more then 50/50 as the paint will not have enough thickness because the thinners evaporates out of the paint, you have to paint in the shade, cause if you do it in the sun the paint doesnt have enough time to flow out and go flat, and may be you could try slow thinners as that will let the paint dry slower and have more time to flow

Perhaps you are used to different sorts of paint, but you absolutely have to thin this stuff 1:1.5 at a minimum. That is what we used at TAFE (also PPG acrylics) and its even printed on the tin. I always got good results there though because we were painting indoors in nice conditions. 1:1 would be like soup

["Z" UTE]

Gotta agree with DrNick here, 4 litres of PPG acrylic will make almost 10 litres when mixed to the correct spraying consistency.

cheers Chuck.

[da_foles]

That Blushing is just buffing out. the last coat had alot of thinners in it so it is pretty light on. I'm buffing the car now and I'm getting some swirl marks? Anything I can do to reduce these? I'm using lambwool pad on a sander polisher electric machine

Also once buffed do I just leave it for about 3 months before I wax it? Can I polish it after I buff it then wax it later?

["Z" UTE]

Glad to hear the bloom is buffing out. The swirl marks are due to the paint still being soft, let it cure. Wax it as soon as you have finished the buffing. The reason I mentioned not to use a compound with wax in it, is that the wax does not aid in the buffing, and simply clogs the lambswool pad.

cheers Chuck.

[da_foles]

How long do I let the paint cure before buffing it has been about 20 hrs since last coat of clear

["Z" UTE]

How long do I let the paint cure before buffing it has been about 20 hrs since last coat of clear

A few days, and put it out in the midday sun for a couple of hours. The longer you leave it the better it will turn out. The paint at this point will still be green and soft, with the outermost skin nice and dry, but underneath it will still be wet, so polishing now will bust through the dry and you will start moving the underlying strata. You have come this far, do not stuff it by rushing to buff it. A panel shop will bake their cars for a couple of hours, put it in the sun for a few hours, and then wait 2-3 days before buffing.

cheers Chuck.

[da_foles]

After Sanding over the car with 2000 I can see a fair bit of orange peel. It is not massive but it is there. I'm scared of sanding all the way through to the paint. Should I just leave? or keep sanding till we get it out?

Here is the orange peel. Do we sand off the clear and try again maybe paint it outside instead of the garage to help reduce overspray?

have sanded wtih 1500 and 2000 very lightly and buffed a rear 1/4 panel. It looks very dull not glassy or mirror finish not happy thought it would come up shinier



How much pressure does one put down when machine buffing? Maybe I have been doing it to lightly? I have just been letting the machine glide over?