Lining paper defect

[cocoots100]

Wonder if anyone has experienced this defect and could tell me what causes it. Was stripping this bathroom in a very old house (all the walls are solid brick with plaster finish. Basically, stripped off all wallcoverings with a steam stripper, then washed down the walls with Tetrion sugar soap solution, made good then rubbed down the walls. Went to cross line with 1000 grade using solvite paste and after 10 minutes what looked like grease was coming through the lining paper (much like when you've missed a nail on the wall and the grease comes through the paper). On this occasion large patches were appearing over much of the walls. It appeared only where the plaster beneath was painted with what looked like an emulsion. The following day it dried back and only left some mild staining on the lining - however if you wet the paper the marks came back. Most bizarre - there is a reaction between the paste and the paint, can anyone help?

Cheers
Tone

 

[confidentincompetent]

Could be old water stains from water damage way back.? old nicotine, which has re livend with your thorough prep ( )

If the lining is sound, then it's probably not distemper. (Pray its not) So try a blocking coat of paint. Cheap solvent undercoat will do , thinned out about 10% white spirit, this will make it easy to apply and will seal in any waterstains. Then carry on painting i.e no need to strip of lining etc. Or if your rich get some zinnsser bin
http://www.zinsser.com/product_detail.asp?ProductID=10 in place of u/c.

good luck

 

[Robbie uk]

I was thinking along the same lines as distemper, sometimes the walls were scumble glazed afterwards and this can have a reaction when activated with paste. Stain block or undercoat should stop it.

 

[cocoots100]

I was thinking about distemper - never seen it before so didn't know what to expect. The walls were not powdery to the touch - after the prep they just felt like normal emulsioned plaster.
I double lined it to see if it would bleed through a second layer of paper, and luckily it didn't.
Cheers for your help.