Can you use emulsion paint as a substitute for primer?

I don't have any primer and I want to paint white gloss over navy blue and suggestions? Thanks in advance.Can you use emulsion paint as a substitute for primer?
as you say you want to paint over navy blue then NO! this must mean it has been painted before so you need an undercoat not a primer.primer is only for bare wood or metal! use a good branded under coat like leyland or crown.making sure it is oil based(check the tin under cleaning it will say use a white spirits not water).remember to lightly sand before painting but not to hard.Can you use emulsion paint as a substitute for primer?
The purpose of a primer is to seal and stabilise the material you are preparing.


Paint process is :-


Rub down


Prime Rub down


Undercoat Rub down


Finish Rub Down


Finish


If you shortcut this by using emulsion for primer all the work you have done afterwards will be wasted. There are shortcuts in DIY but using emulsion instead of primer isn't one id recommend.
Not recommended.
Yes you can. But you need to make sure you sand down well before you use it.
No emulsion is water based and the gloss will peel of.
You can use emulsion on new wood as a primer.





It will also do as an undercoat but I wouldn't recommend it because it will be easily chipped.





I assume the surface is wood with navy paint on it. I would put 2 coats of undercoat on then gloss. If you are using Satinwood (which is self undercoating) put 1 undercoat on and then a Satinwood. If you don't think it's covered, put a 2nd coat on.
Yes you can I have done it all the primer does is cover a stronger colour and provide a key for the gloss to hold on to Emulsion will do both of these
i have done this before and it worked fine, esp on new wood, but would never admit it to my brother in law who is a painter and probably would shout at me!!!
emulsion is water based and therefore not a good base for gloss paint,it wont last as long as using a good gloss primer that why they have it
hello, A bodge yes you will find the top coat chips easily. If a jobs worth doing do it properly.(moto) Glass paper down, dust down, seal any weepy old knots,it might need two undercoats see results on first? apply top coat, stir paints well before applying.
I've done it before. Gave the MATT emulsion a light sanding and it was fine. If it's the blue that is the emulsion though, be careful as it may be hard to cover over with the white.





Perhaps it would be safer to just to buy some primer. You may end up making a lot of work for yourself otherwise.