Thank you Nestor I see how important tempature is for the problems I have encountered.
I have applied one coat of the stain sealer on the ceiling it dried to a beige colour/fawn and wow what a transformation of the ceiling it actually makes me want to leave it as is,compared to how it looked prior.
Application was great with a roller seeing how sloppy it looked in the paint tray,I do intend giving the ceiling another coat just in case.
Throughout this room I have had to patch up walls and the ceiling,in some cases large cracks as well as replacing sections of plaster that had to be cut out of existing plaster and fitted in,very old house here.
I did notice that where I had done these repairs to the ceiling where I had joined up and bogged up large areas,the one coat of stain sealer hid all of these,the ceiling looks so flat.
With any sealer left could I apply some over these type of bogged up areas on the walls,allowing I would be only doing these areas and not the whole wall.
At present the walls are of a white colour from the undercoat I have already applied.
Would the beige colour of the stain sealer applied only where required on the white sealed wall conflict with the colour I want to paint the walls, which is Crushed Rock, which will be a low sheen to assist in hiding these repairs.
I suppose I mean if i was to paint crushed rock on a wall which has a normal type sealer which finished white and the same colour on a wall finished in this stain sealer which finished in this beige colour, would there be a difference in the one colour on the two walls?
Thank you for your time and input into my questions,every thing is being taken on board here