Spray Painting Help **PICS ADDED HELP STILL NEEDED**

madeofmilo · Post by **madeofmilo** » Thu Dec 29, 2005 10:25 pm

Hey guys,
Here are some pics, don't laugh.

What the hell is going on?

cheers Dave

thanks hcca

hcca · Post by **hcca** » Thu Dec 29, 2005 11:02 pm

Do alternate vertical and horizontal coats to stop tiger striping.

Also, if you're using acrylic, you might find it beneficial to give it a light sand (wet 800/1000 or so) before applying more coats.

madeofmilo · Post by **madeofmilo** » Fri Dec 30, 2005 12:12 am

ohh this is going to sound so dumb,

I was told to only go in one direction. If i go both ways it should be better.
Thanks hcca!

StarionBoy · Post by **StarionBoy** » Fri Dec 30, 2005 2:45 am

how have you sanded it back?? if you have just sanded one part down and not another part then obviously ur gonna see the line where the old paint is higher than the new paint.. try sanding the old paint (which ur over lapping) so it gradully gets thinner if u know what i mean..
really hard to describe in words on here lol

chunkhead · Post by **chunkhead** » Fri Dec 30, 2005 11:58 am

Really light coats, left to right and then right to left! Remember to start spraying from just off the panel, and stop just off the panel on the other side! Make sure your pressure isn't too high also!

madeofmilo · Post by **madeofmilo** » Fri Dec 30, 2005 12:12 pm

hey guys, thanks for help. It still looks shit. Dunno what to do, my gun must or may be set incorrectly.

Cheers Dave

hcca · Post by **hcca** » Fri Dec 30, 2005 4:35 pm

What's wrong with it? Rough finish? Not shiny?

Did you sand off overspray between coats? (you can do multiple coats without sanding, but you should do them within 5 minutes of each other).

madeofmilo · Post by **madeofmilo** » Sun Jan 01, 2006 10:48 am

sanding eh? maybe I should post a picture. So you know what I'm on about.

cheers Dave

hcca · Post by **hcca** » Sun Jan 01, 2006 12:28 pm

sanding eh?

I take it from that you didn't :) If you spray over the top of overspray, it will make it rough. The paint has a flash time and a recoat time - flash time is around 5-6 minutes usually which means you can spray multiple coats 5-6 minutes apart. If you go over this time, you should wait until the recoat time before spraying again. Before recoating, sand back with 1000 wet to get rid of the overspray/rough finish areas - it should be smooth to touch.

The good news is, what you've done is probably fixable - try sanding it back now with 800/1000 (depending on how bad it is) wet. If you dry off the areas that you've sanded, you'll probably see a whole lot of tiny pits. Basically, keep sanding until all the pits are gone (try not to go through the paint though) - it will take ages :). Don't sand in a circular motion either. If you're going to clear coat it, do that now. If not, once all the pits are gone, go over it with a medium grade cutting compound, followed by the meguiar's 3 part polish system (paint cleaner/polish/wax) and it should come up nicely. If you DO clear coat it, the same procedure after clear coating will give you a nice finish too - yes, it means sanding all the pits out again!

madeofmilo · Post by **madeofmilo** » Mon Jan 02, 2006 11:10 am

hcca, thanks again for your help mate. Why couldn't you live in Melbourne?! I got a quote to do the 2 panels I wanted and it was $500 and I though fuck it, I can do this, and the paint was only $50 so even if I have to sand it right back and start again (I did prime) I'm still up a few hundred.

Please hcca tell me it's a skill and you do get better!
I figured I may as well learn to do it now so when I'm older I can do it no problem but dam it's hard!

Cheers Dave

greenstaz82 · Post by **greenstaz82** » Mon Jan 02, 2006 3:34 pm

hey mate , is the finished job really rough ? , coming out of the gun like stone gaurd would ? lol , if so i think your not applying it wet enough or u havent thinned out the paint enough . A good mix for acrylic is 40/60 , 40 % paint 60% thinner , another way is to roughly guess your paint and thinner into the gun stir it up , pull the stick out and let the paint run off while counting to 7 , all the paint should be off the stick and dripping by 7 seconds. if the paint runs on after 7 seconds it is still to thick and if its dripping before 7 is is to thin . I hope that helps u out a bit , im not a painter but played around with spray guns and paint a bit before . good luck :beer

hcca · Post by **hcca** » Mon Jan 02, 2006 4:20 pm

What's the weather like? If it's really hot, you're going to need a slower thinner (ie. won't evaporate as fast). Right now probably isn't the best time for painting :)

It looks from your pics like it's coming out too dry as greenstaz mentioned which could be either incorrect/not enough thinner or too much gun pressure.

Compressor should be set around 35-40psi (assuming you're using an HVLP gun).

It also looks like your surface prep might not be that good :).. I'm assuming that you didn't sand back to bare metal first so you probably don't need an etch primer, but did you use a primer/surfacer before the colour?

Also, I can still see a bit of striping - it may need another one or two light coats.

As it looks like it has a rough finish to it, try what I suggested with the wet and dry paper, polish etc. You'll be surprised :) Just do a small area first and sand it back until you can't see any pitting in it (you'll have to dry it off to see). Once that is done, polish it up and see how it looks.

EDIT: Just looking at your pics again - the bottom one suggests it's too thick - what mix of paint and thinner are you using? Should be about 3:5 ratio.

It's something that you've got to have a go of though - my first car sucked but I learnt from the numerous mistakes I made and the Starion turned out pretty well.. it's far from perfect, but it will do for now :)

madeofmilo · Post by **madeofmilo** » Thu Jan 05, 2006 5:36 pm

DUDE THANKS HCCA!!

I sanded back (using wet 1000) and cut (doing a thorough job) and polish using all good products. Then it came up amazing!
I was under the impression that after just painting it should look great. Turns out there is still heaps more to do.

I've got a panel I've just finished bogging, could you give me a list of the steps for painting - trough to finish.

i.e
1) prime
2) sand
3) mix paint with thinner (60% thinner 40% paint).
4) paint
5) sand (wet 1000)
6) paint other direction
7) sand (wet 1000)
8) repeat 4 - 7 a few times
9) cut (cutting compound)
10) polish
11) gloss?

did I miss something?

cheers Dave

madeofmilo · Post by **madeofmilo** » Fri Jan 06, 2006 4:35 pm

is it similar with metallic, which I'm using.

Cheers Dave

**also MODS could you cut and paste HCCA's last paste and make it a sticky on "how to paint" 'cost there is nothing out there about it **

tmz_99 · Post by **tmz_99** » Fri Jan 06, 2006 5:15 pm

madeofmilo wrote: **also MODS could you cut and paste HCCA's last paste and make it a sticky on "how to paint" 'cost there is nothing out there about it **

Done, please find HCCA's last 2 posts in the body & interior mods section under their own topic sticky.

Austarion

Spray Painting Help PICS ADDED HELP STILL NEEDED

Spray Painting Help PICS ADDED HELP STILL NEEDED

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