Paint/Lacquer help
Turbo Mini Forums

One for Wiggi or Rick I think this....

At the moment I am refurbishing some alloy wheels, I have bought 2k basecoat and clear lacquer.

The basecoat doesn't have hardener, just 50/50 paint-thinner

The lacquer is 2 parts lacquer to 1 part hardener plus a splash of thinners

Question is, should I put the lacquer on top of the base whilst the base is still wet, or should I let it go off first? I can't seem to find a definite answer on't net?

I've done plenty with celly but never dabbled in 2k much, however for wheels I want something durable.

Before anyone pipes up, yes I do know about 2k, and yes I do have a proper mask.

Cheers chaps

you can let it dry Tom, but if your feeling brave go wet on wet,
theres only an hour difference between the two

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The base coat will go matt when its dry - about 15 mins in decent temperature thats touch dry too, so you can wipe over it again with a tack rag if you want.
Do a couple of colour coats, letting it dry or 'flashoff' inbetween, then the lacquer.
Its pretty much impossible to get runs in the colour as you can dust it on, but as you know, be careful on the lacquer coats not to get runs

Paul

I seriously doubt it!

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As paul said tom, the base will be touch try in a few mins and you can tack inbetween coats, you will find usually two coats and a drop(dust) .It will dont go over it when its still wet, but by the time youve cleaned the gun for lacquer then it will be dry anyway.

Rick

Paul I thought that the base would take alot longer to flash off with just thinners and no hardener? I was also under the impression that with doing 2k Paint and not using the hardener you needed to catch it just as it flashed off before putting on a lacquer or leave it 24hrs / or bake? Is this a bit of a bad case of chinese whispers? I know when I painted my car I did 2k with thinnners and no hardener then polished out my orange peel. I never did put a laquer on it. Whats the best way to do it to get a good finnish?

With direct gloss colour you use a hardener and no lacquer.
With clear over base you never put hardener in the colour, it just air dries. You need the lacquer for the gloss finish as the colour goes matt on its own.

Paul

I seriously doubt it!

Orange peel is down to how the paint is applied. The gun is to close to the job.

What guns you lot using? Your aircaps need to be 1.2 for car stuff, 40psi at tip, medium/to big fan.

Tom, your best bet is to let it 'flash off' then apply a light dust coat of laquer, let that settle for about 20 mins so its tacky. Then apply another 2 coats, but slightly heavier. Thing with wheels, the little bits that are hard to reach, blow them in first to insure you get a decent coat on them.

Get some pics up when done :)


Need any more help, give me a shout.

Lightweight racer coming soon.

Cheers guys. The gun I used was a borrowed item from a friend. Once I get my welding done I am going to be in the market for my own gun. Any recommendations. It will be hardley ever used so nothing to steep. But I dont want a pile of crap that is going to make painting my car again even harder than it is?

devibiss gti with a 1.4 fluit tip and 110 air cap. max 2bar

Thats all i use to be honest and there not that dear these days, as most of you will no though its not the paint its the prep.

Rick

Lockfast - Something like this will do. :)

http://www.machinemart.co.uk/shop/search/f...type/any/page/1

Lightweight racer coming soon.

Thank you

sorry to hi-jack Tom.

would a gavity gun be better for me with a smaller compressor?

Depends how much you got to paint, I prefer using both gravity and suction fed.

My GTi suction has a 1ltr pot, so good for doing cars etc.

Small bits, bike panels, helmets etc i use my gravity.

Personal prefrence tbh.

Lightweight racer coming soon.

Cheers all, we'll see how I get on today.

Well here are my painted wheels, in the end I let the base go touch dry and then lacquered them. They are for my Peu**ot sorry




They are not perfect, but I'm quite pleased with how they have come out.

Another Q, how long have you got with the lacquer in the gun once the hardener is in? I was paranoid it was going to set like glass in the bottom if I left it too long!! In the end gave them 3 coats of lacquer within about 15 min then washed the gun out.

They look smashing, but you need a bigger tarpaulin!

Fastest 998 mini in the world? 13.05 1/4 mile 106mph

They look good Tom.
The lacquer wont go off too quickly in the gun due to the amount thats in there, Ive left it an hour before cleaning the gun before and it was OK

Paul

I seriously doubt it!

Good to know Paul!

Wil I know, however the garage floor has had a variety of different shades of overspray on it, plus a big slick of red when I kicked over a paint tin, oh well never mind!!

A tip for next time Tom, get them higher and you wont blow dust around so much

Paul

I seriously doubt it!

Did you use etch primer on the ali?

Geoff

Yes I did

If he use dthe old paint as the foundations he need no apply etch primer.

A tip for anyone else attempting this. When applying your colour coat start by dusting on the base colour, do this will a little more pressure than you would to apply a normal colour coat but turn the paint right down, this will effectiely blast the paint onto the wheel without chronic over spray.

It takes a fair while to achieve total coverage but what you end up with is a very good acnchor with paint particles in a more verticle fashion rather than flat. For your next heavier coats, again these should be dust coats solidify the colour around all the edges and profiled aareas of the wheel. Doing it this way you wont use a lot of product so solvent traps wont become an issue.

Now you have solid colour on your edges good cour coverage on all other suraces finish the job of by applying good drop coats.

The drop coats will make the surface colour even and present the laquer with a good foundation to key to.

Through out the whole process your wheel wont actually get wet but be constantly tacky.

If your looking for a gun to use gravety is the only may you will use less air and waste less paint! I recommend Sealey which is a copy of the Desoto modle and a Kestrel which is a copy of the Devilblis modle.

Get the quick release fittings as used in all spray shops so you can use the plastic tubs that take the disposable refils. By turning your gun upside down you can remove all the excess air from the pot thus allowing you to spray at any orientation without loosing paint feed. Suction guns have to remain near verticle at all times gravity fed guns dont!

Own the day

It's not the paint in the paint pot, its the paint in the gun pipes itself that goes off

I normally get a ragged soaked in thinners and drape it over the pot, and leave the gun standing in a bucket/kettle of thinners if leaving for a long period. that way the thinners will keep the paint in the gun moist

Lightweight racer coming soon.

On 15th Apr, 2009 Radleigh said:
It's not the paint in the paint pot, its the paint in the gun pipes itself that goes off

I normally get a ragged soaked in thinners and drape it over the pot, and leave the gun standing in a bucket/kettle of thinners if leaving for a long period. that way the thinners will keep the paint in the gun moist

Edited by Mr Joshua on 16th Apr, 2009.

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