Doing some DIY at home chaps. Would appreciate some tips for these :
- Whiten old grout between tiles, which now look yellowish
( kitchen and bathroom )
- Kill off black mould on grout between tiles
( kitchen and bathroom )
- Kill black mould on silicone
( next to kitchen sink )
- Paint on the walls next to my front door ( outside ) has cracked. What's the easiest way of fixing this ? And, what paint should I use so that it doesn't crack
- What can be used underneath polycarbonate sheets in the conservatory to keep the heat and sunlight out from the roof ?

