Good luck with your bash,passenger cars look sooooo much better with a detailed interior especially when lit,just finishes them off. I have done a few and maybe able to give a few suggestions,Aristo cars are the easiest as have done 4,a Piko caboose and more than a couple of Bachmanns.The later are the hardest to do as very very little room between the car side and the stock interior molding if you wish to panel the sides and if you can remove the glazing without breaking.I will post a pic of the Piko drovers caboose of an example but cant find any of previous builds,if I can find will post later,as for upholstery,repaint yes,coloured paper or coloured felt work well but be careful of the glue as can seep through and ruin the material,got those from Hobbycraft.Styrene square rod makes simple arm
Most helpful. Always good to learn from other people’s experiences. I started to fit out the interior of a Bachmann caboose kit but haven’t got round to finishing it yet. Adding things like missing glazing and upgrading plastic details to whitemetal (S&D Models) makes a great difference.
A few pics of a couple of car bashes,I posted during their construction but alas the pics were lost so taken a few more.First my private car,ex D&RG observation,
track powered with LGB marker lights added with full interior,1,showing the kitchen staff hard at
work,oven and pans in the background,pic 2 the bathroom,bath and wc showing the brass fittings
and towel rail;pic 3 second view of kitchen,tap sink plates and
utensils,pics 4 and 5,the saloon,table set for dinner including candle sticks and cutlery,floor carpeted,custom easy chairs,pictures on wall and
clock/ornaments.The car has curtains and blinds throughout.
PIC 6 is the bedroom.pillows,bed covers and furniture,
the bed,table and chairs and dinner service are dolls house items.The second car is bashed Sierra car using Bachmann seats,it was a starter set car with an empty interior now re glazed,paneled interior sides together with custom stove,felt upholstered seats,blinds and LED strip lights with paneled roof inside.The combine has the same build to match,one of 4 cars the observation car also has track power marker lights and the conductor`s watch chain is 9ct gold,I hope some food for thought at least
but on the other hand she ordered a new soft top for her jeep a couple of weeks ago,half the price of my LGB Alco and did i mind?,,,works both ways
and yes I had to fit it!!
track powered with LGB marker lights added with full interior,1,showing the kitchen staff hard at 
work,oven and pans in the background,pic 2 the bathroom,bath and wc showing the brass fittings
and towel rail;pic 3 second view of kitchen,tap sink plates and 
utensils,pics 4 and 5,the saloon,table set for dinner including candle sticks and cutlery,floor carpeted,custom easy chairs,pictures on wall and 
clock/ornaments.The car has curtains and blinds throughout.
PIC 6 is the bedroom.pillows,bed covers and furniture,
the bed,table and chairs and dinner service are dolls house items.The second car is bashed Sierra car using Bachmann seats,it was a starter set car with an empty interior now re glazed,paneled interior sides together with custom stove,felt upholstered seats,blinds and LED strip lights with paneled roof inside.The combine has the same build to match,one of 4 cars the observation car also has track power marker lights and the conductor`s watch chain is 9ct gold,I hope some food for thought at least
