Spraying again its difficult to understand.

[OLD]

My son a architect comes up with unusual designs for me to produce, the current is a book case which is best described as a number of different sized boxes some shallow others deep all assembled into a unit to form the case .I am thinking MDF as there is a lot of board area, mitre lock construction and when i mentioned spray painting it triggered ideas for different colours for some of the boxes .
So the problem is spraying MDF from search results HVLP seems to be the way to go and maybe eggshell paint then we get into different makes, thinning and needle size, paint type, primers etc.Can any one put me right in a not over expensive way that will work with the minimum of adjustment ,i have not sprayed before but like the idea of spray finishing hard wood projects in the future after this coloured work.

 

[RobertMP]

I'm currently re learning to spray .

I too have saved the various HVLP advice I have found on the forum for spraying MDF and have bought a used Fuji Q3 which I am still getting to grips with. Currently I've taken a few of the 12mm plain MDF doors off of my workshop cupboards and am experimenting with various primers and paints. I have sprayed before but it was conventional high pressure and mostly stoving enamel (and 25 years ago) so this is a learning curve for me too.

I'm getting better with the spraying and using up some of those old paint cans in the shed too :lol: . Once I feel my technique is reasonable I'll buy some of the suggested finishes and some green MDF and try to make a pukka kitchen cupboard door!

So far water based paints have been just OK but oil based have gone on lovely. I've made a dust sheet spray booth in front of my wall plate extractor fan. I knocked up a wooden frame to sit over the fan and a removable cloth filter (OK a couple of layers of old net curtain) that fits to it to catch the airborne overspray. Working well so far and the fan is still clean.

I'll watch this thread for more advice too

Oh and as to your question - I don't think there is any substitute for practice with spray painting. Getting the mixture right, gun settings right and the coat right all take a bit of learning. I've sprayed a fair bit of cardboard (test pieces) in my time

 

[JonnyD]

Hi for coloured work in mdf i generally use a pigmented Acid Catylsed Lacquer from
http://www.morrells.co.uk/coatings/fastmatch/index.php

this provides a durable hard wearing finish that is easy to apply (with Practise). It may not be suitable to use however without fume extraction but i think they now do waterbased pigmented lacquers.

If i am doing some simple mdf boxes i tend to design the project so the panels can be sprayed as flat panels and then assembled afterwards either using knock down fittings or biscuits or dominoes. Trying to spray inside a glued together box may result in some overspray and less than perfect finish depending on the size of the carcase.

I use a fuji HVLP sprayer and would highly reccomend it

jon

 

[OLD]

JonnyD
Thanks for your help but Morrells is trade only and i find there info very difficult to understand .

 

[ivan]

explore this site for various training docs, including "ABC of spraying"

http://www.itwifeuro.com/Training/Techn ... ok-ups.asp

 

[planetWayne]

Not wanting to hijack this thread - but daughter wants - shall we say an interesting design on her bedroom walls :roll:

anyways I was doing a quick search and came across this thread - my quick question - is it possible to spray emulsion paint (as in the stuff you get from b&q to cover walls and ceilings etc)

I've got a gravity fed gun that came with a compressor I bought last year - never realy played with the sprayer and dont want to do any damage to it or the gun.

Anyone any thoughts (attempted such?)?

Cheers
Wayne.

 

[George_N]

Wayne,
regular emulsion paint is too thick to spray with conventional spray equipment (and you can't thin it down much), you need airless spray kit like that used for exterior masonry paint etc. If you want an intricate design it sounds like a job for a small air brush sprayer, never used one and I don't know how they perform with water-based paints but I gusee if you can thin it to the right viscosity it should be ok.

 

[planetWayne]

Mmmm I was wondering how much I would have to thin emulsion down by... May have to look at some other type of paint. We did have the idea to line the walls first with lining paper so if we needed to at least we could strip it off.

There is a type of paint I've used before on a small job - the name slips me for a min - will have to have a look at that - but the quantity could be a problem as it was sold in tubes and that would be one **** load of tubes needed for a room! (wasn't oil based paint - was water based)

Need to experiment a little I think....

I'll have to have a watch of the woodworking channel - there was an episode with David Free(?) where he made a radiator cover which he sprayed - cant remember the type of paint he used but that may work.


Cheery
Wayne.

 

[RATWOOD]

hi Old
a/c is the to go on mrmdf sand the edges 180 240 320 2 coats primer 2 top coats
I will contact my morrells rep on monday as he is on holiday tell then I am sure they do c.o.d

made with mrmdf

 

[Dave S]

There is a type of paint I've used before on a small job - the name slips me for a min - will have to have a look at that - but the quantity could be a problem as it was sold in tubes and that would be one **** load of tubes needed for a room! (wasn't oil based paint - was water based)

Acrylic? It can be mixed with emulsion if needs be.

You don't say what you are wanting to do, but maybe this site which I have bookmarked is of use? They don't seem to have anything about spraying but do have info about other paint techniques.

Dave