Rather than barring Indian products from entering, Pakistan should let them enter and let the consumers do the talking! Remember, whether their products sell or not, large amounts would be invested in Pakistan and that's for Pakistan to gain and India to lose if the products don't sell.
Regarding Chinese autos, I have read that Chinese bikes were sold in India and sales were brisk initially. But it eventually died down due to quality issues. Indians didn't reject Chinese bikes because Chinese are claiming Tawang. Everyone knows Chinese autos have quality issues.
India for example freely allows tyre imports from China although it is gobling up market domination of local manufacturers like Apollo, MRF, Ceat and JK. However they are fighting back by pricing their goods more competitively (Indians, correct me if I'm wrong).
I travel very frequently to SEA (namely Malaysia, Indonesia, Thailand and Singapore). Let me tell you; although Chinese cars (Chery) are available in Malaysia for the past 3 years, I'm yet to see any on the roads. And that despite the fact that 30% of Malaysia are native Chinese! You can even find more M&M Scorpios and Tata Telcolines in Malaysia. I can provide pictures if you wish. If there are any Malaysian PWers here, pls verify what I say with them! Same in Indonesia, Chinese bikes available but demand is low due to quality issues again. Bajaj and TVS doing better.